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Post by djloone on Mar 24, 2016 19:59:13 GMT
sh*tty mate..fingers crossed you n the bike are bk 100% soon
LOON-E
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Post by doulsy on Mar 24, 2016 22:12:13 GMT
Very small disaster today after some nice success. Was fiddling with the jetting on the Tourer and its now much better, not perfect but better. Then it was going so well I took it for a longer ride and was getting a bit cokky on it until I slid off it pulling out of a junction! Front wheel just went sideways and I was down like a sack of spuds. Haven't fell off for years and my big body is a bit old for all that. Will be limping for a few days for sure, scooter fell on my ankle. Saved the legshield from touching the road, so not all bad has florida bars so no real damage at all, just a big scuff on the already knackered mudguard. Will have a good look at it tomorrow, hopefully nothing I havent seen. thats sh*t, hope your ok
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Post by henri on Mar 25, 2016 9:51:03 GMT
let me guess , patch of diesel rainbowing the junction , or a heavy right hand . my moneys on the throttle ,eh. an we aint kids no more ,we dont bounce like we use too . hope ya up an around soon an scoot aint too dented , was anybody watching , tad embarrasing eh . H
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Post by sime66 on Mar 25, 2016 10:02:53 GMT
Oh blimey, sorry to hear that. Hope the ankle's OK; you'll probably feel it more this morning. I'm sure scoot can be fixed-up, and at least you've got a few others to play with. Chin up. - I saw a young chap on an auto scooter lying on the grass in the central island of a roundabout yesterday morning, had slipped or been clipped and took a little tumble. Got to be alert all the time; and not too c**ky!
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Post by pxguru on Mar 26, 2016 6:56:02 GMT
Thanks lads No where near as bad today, will be fine by Monday. Still not been to the garage to re-check the damage. Will do today.....probably. Not sure what was on the road but all my own fault. I had just come off of nights the day before. I was starting to think the mudguard was not so bad, so at least that is out of the question now. Any good links to a decent chrome one?
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Post by pxguru on Apr 5, 2016 16:07:53 GMT
Been fiddling with the jetting on the tourer. So close now. It doesn't have a temp gauge, so I have been doing it by "seat of the pants" method. Will get a cheap temp gauge to fine tune but won't pemenantly fit it.
Latest jetting: SI26/26E carb. 2.0mm drilled MJ hole, 48/160 pilot, 185 air corrector, BE3+2, 138 MJ, 04 slide.
a point to note is that the 2.0 mm carb drilling has totally changed the pilot jet. It was fine on a 55/160 before but after the drilling this was way over. I feel the 48/160 is still very slightly rich at 1/4 throttle and I need the next one down 45/160, probably. I dont have one so will need to order. It is running almost perfect now so no hurry.
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Post by sime66 on Apr 5, 2016 16:48:14 GMT
It's very interesting to see your jetting settle as you get close, and to compare our findings. I'm reassured you found the same with the Pilot after drilling; I was doubting my competence a little when mine went so lean. I suppose the BE3+2 and the AC185 are for the same reason. You seem to be coming to similar conclusions, which is good to see (apart from the MJ). - I wonder if you'll stay with the #04 slide; very interesting........
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Post by pxguru on Jun 17, 2016 7:00:57 GMT
Been fiddling with the tourer some more now the weather has changed the jetting wasn't as close as I thought it was.
Latest jetting: SI26/26E carb. 2.0mm drilled MJ hole, 50/120 pilot, 185 air corrector, BE3+2, 130 MJ, 04 slide
Now it is really close. Trying to get the jetting optimal especially the pilot jet to improve the fuel economy. Still no temperature gauge but feels great, pulls hard and keeps up with any traffic.
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Post by vespasco on Jun 19, 2016 18:59:40 GMT
Glad to hear you're getting in the miles guru ji
Im still running my un modified si24 carb... i've not drilled it out yet as tbh, i dont want to f around with idle jets again...but i cant notice too much difference upping/downing the MJ, which leads me to beleive the si carb is on its limits... (Im running on a BGM 150 atm! - I've just received a few more MJ jets so i can come down a size or two)
Anyway, i just asked this on simes thread ... ... i'm interested to know and you also pointed it out, how all these idle jet changes affect the starting?
I asked because, I'm used to stomping on my kickstart once (when warm/hot) and it will start with no throttle...thats how i like it anyway! I noticed recently, when i changed from a 52/140 to a 50/120 and went on a long run, that it would not start (it did eventually) after a quick pit stop for fuel...It wasn't the only time it either, it was difficult to start when cold when using the 50/120, despite tweaks on the mix screw. I swapped back to the 52/140, adjusted the carb again and no problems... back to normal, one kick when warm and temps and running are good
Is there something in it? or did i just do a bad job of setting up the 50/120?
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Post by pxguru on Jun 20, 2016 3:08:27 GMT
Vespasco, Doesn't sound quite right does it? Your 50/120 might be a dud and actually Bigger than it is or you didn't set the mixture screw correctly. The big number has less effect when starting. You really need to get that carb drilled or put the 26/26 back on and try again. I expect the un-drilled 24/24 won't run much richer if you took the main jet out completely.
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Post by pxguru on Jul 22, 2016 16:15:26 GMT
I was not happy that it needed the BE3+2, so rejetted it with the standard BE3 and AC160. So far the latest Tourer jetting is; SI26/26E carb. 2.0mm drilled MJ hole, 50/160 pilot, 160 air corrector, BE3, 128 MJ, 04 slide I reduced the MJ to 125 at first and the mid splutter went away but overall it felt too weak. Put the 128 MJ in and it was still fine but slight splutter at progression (1/8th to 1/4 throttle). Needs a slightly smaller pilot jet to fix that, next time out and a decent set of plug chops, at full thrash temperature to be sure its all ok. And that will be that. Feels much nippier now and more happy with the way it revs out. Doing 44mph in 2nd and 62 mph in 3rd so that's about 7800rpm max. Which will surely mean it will do at least 6800 rpm in 4th and that will equate to more than 73mph. Will let you know how this calculation works out in reality
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Post by sime66 on Jul 23, 2016 4:45:08 GMT
Those are interesting set-up and performance figures; noted with great interest. I wonder if your standard intake, bellows, and filter make the BE3 more viable in your case, and wonder if leaning the Pilot to overcome the flat spot might lean-out elsewhere if drilling BE3 is rejected (maybe more so in my case where I had a real problem with big carb drilling and strangled intake, leading to BE3+). I also wonder how these mid-Summer, particularly hot ambient temps will hold up through Autumn morning frosts and Winter, with regard to mix and cooling, which is the excuse I’ve given myself for not having done much while it’s so hot. I won’t clutter up your thread with questions; I’ll try to make some progress and update my own thread soon, but nothing to report at present.
Your 3rd gear is same as mine was (I haven’t checked your speed-revs yet, but don’t doubt them); I’m looking forward to see if your projected 4th gear is also similar as projected.
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Post by vespasco on Jul 24, 2016 17:15:29 GMT
cool ive also really noticed the difference in running with these warmer temps we're experiencing recently...im experiencing a little spluttering in the same 1/8- 1/4 position too i tweaked the idle and its a little better now but i know for sure i need to drill out my feed hole too...just waiting for a quiet week my third is also 62mph with a SIP mkll (but not quite with the Sip mkl)
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Post by pxguru on Jul 31, 2016 17:20:32 GMT
I have tried but I can't make the BE3 and AC160 work. Is either ok at WOT and spluttery at 1/4 throttle or the other way around and weak at WOT. Can't live with that either. So, back to BE3+2 and AC185 will try 50/120 and 135MJ and work from there.
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Post by sime66 on Jul 31, 2016 19:13:49 GMT
This doesn't surprise me; my low revs after each gear change have been sluggish compared to previous, and I've been wanting to perk it up a bit with a BE3 tweak......
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Post by vespasco on Jul 31, 2016 19:15:37 GMT
get it ok at WOT and then try a 50/160
i hope you're not having the same problems i'm having with my si26
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Post by pxguru on Aug 2, 2016 17:15:51 GMT
The 26 is a bit difficult now it is drilled to 2mm but seems to be the opposite of yours, as mine is too rich.
Jetting now; SI26/26E carb. 2.0mm drilled MJ hole, 50/140 pilot, 185 air corrector, BE2, 132MJ, 04 slide
I am thinking one issue is the extended inlet duration. The other is that mine is still running autolube, so everything is slightly richer.
Still very slightly rich at 1/8 throttle but in general running really well. Will do some plug chops tomorrow to check its really ok.
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Post by sime66 on Aug 2, 2016 17:35:45 GMT
The 26 is a bit difficult now it is drilled to 2mm I'm beginning to think the 2mm is proving to be too big for getting the Pilot right; my Pilots went right off the lean end of the scale before when I tried to get it spot-on. It clearly gets those silly-big Main Jets under control (not so much for yours, vespasco?), but it makes getting the rest of it tricky. If my new 26/26 body isn't a duffer (yes I decided to take a chance on the one I pointed out to you on Sunday), I might try 1.8mm drilling first instead.
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Post by vespasco on Aug 2, 2016 18:09:42 GMT
That's surely made up my mind, I'm putting back on the si24 and look for my 1.8mm drill again
If the 50/140 improved it then the 50/160 will be amazing I'm sure
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Post by pxguru on Aug 3, 2016 6:42:16 GMT
Sime, You could try your 2mm drilled carb with a BE2. Seems to be working fine on mine and leaves space for a richer pilot jet.
Vespasco, I would be intersted to know why your 26/26 doesn't behave like it is 2mm drilled at all.
Once I have done a WOT and mid plug chop, I'll try a slightly leaner pilot jet. Overall it feels like I could leave it right where it is now.
Edit: A remider for the readers as to why we are doing this. The 24/24 and 26/26 carbs do not deliver enough mixture for a tuned engine. Even if the main jet is increased to 160 there is still not enough mixture. Drilling out the carb allows a lot more mixture through and it is possible to use smaller jets again, seems like 2.0 mm is maybe too much mixture for some.
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Post by sime66 on Aug 3, 2016 7:51:27 GMT
Oh, you slipped that in; I only just noticed you’d gone to BE2. Last time I looked you were thinking of returning to BE3+2. I just had a bit of a hunch that my Pilot went really lean after those carb mods (OK for MJ stack, too much for Pilot? - just a hunch), so thought I’d mention it as you and vespasco are tackling it again now, and you’ve had difficulties with 2mm drilled 26 too, and maybe I’ve got another 26 body to play with, and 1.8mm might prove better - for mine. My comment was based on my previous findings rather than any recent tweaks; I’ve been a bit slack and reluctant since the CHT issue, but I’ll get back into it properly after my MOT, and plan to keep the 2mm drilled 26 carb, but may have the 1.8mm option to try – I don’t want to break anything right now though anyway. (I'm sort of waiting to see what you do too, but I'm keeping that to myself). I reckon vespasco’s left a big chunk of swarf in his jet well, or he’s got a wonky bottom.
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Post by pxguru on Aug 4, 2016 14:43:12 GMT
Well I think that's that. Jetting now; SI26/26E carb. 2.0mm drilled MJ hole, 50/160 pilot, 185 air corrector, BE2, 132MJ, 04 slide
Running great. There is always something that can be done but for this Summer that's it. Plug running nicely digestive and not expecting any issue in Winter. No spluttering and riding well. Give it a 1000 miles or so and I'll fine tweak it again but I am staying with this until I have reason to change it.
Sime you should put your pervious safe jetting back and see how you like it.
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Post by sime66 on Aug 4, 2016 14:53:34 GMT
"Sime you should put your pervious safe jetting back and see how you like it."
I'm so glad you said that; I've been tempted to do exactly that for a while (my jetting before the tripple-whammy),it was my first thought, and your recent progress seems to confirm it might be OK too - a lot of work went into getting to that point, so rejecting it never seemed right to me. I was thinking I'd use that as the base, but start a bit richer to check for rich plug first. Pleased yours has worked out well.
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Post by djloone on Aug 4, 2016 16:01:34 GMT
Sime can you give me a quick recap on your safe settings...i have a box of various jets arriving tommoz for me too start playing with..and without trawling back through many posts im gonna bow too your knowhow and rob yours as a starting point...too be honest if mine runs ok 2 up and can pull 55ish all day long im probably gonna wimp out and leave mine as is..come autumn im thinking of a new project that could be more power based for us too get our teeth into LOON-E
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Post by sime66 on Aug 4, 2016 16:07:16 GMT
..posted a reply on your build thread
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Post by djloone on Aug 4, 2016 16:22:50 GMT
Cheers m8
LOON-E
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Post by vespasco on Aug 4, 2016 19:39:26 GMT
I'm glad someone found a use for the BE2. I tried that once, on my si24 and Pinasco , just for fun, that needed a lot of work to get running even somewhere near close to useable. I think it's from my old SS180. I also have an E2, which is very similar to BE2 but with even larger holes. That's a lot of air going through there, trying to stop the fuel.
I'd prefer to try 1.8mm next time.
My si26 had the same problems before drilling, same plug readings despite large jets. Despite running richer. Even at half throttle. There's surely a leak somewhere although likely very minute. I'll take another look when I take it off. I must admit I got lazy and didn't bother lapping it before I fitted it. It definitely ran rich with a 155MJ and runs ok with 150, based on seat of pants more than anything although temps are not excessive, possibly the odd small pinking at certain revs which also showed on the CHT, yet the plug is horrible. White porcelain and ash grey electrode. I don't think it's drilling the feed hole that's affected any of that on my carb. It's definitely drilled through, I've seen the tip of the drill going round and round at the bottom of the hole. Swarf? possible.
How is the si26 sime? Does a slide slide? does it look flat and clean?
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Post by pxguru on Nov 22, 2016 16:39:11 GMT
I am now on with the Tourer. Have all the parts/tools/drills available Will get on with it and tomorrow. However, need to wait for the rain to stop for a decent jetting session.
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Post by sime66 on Nov 22, 2016 19:18:12 GMT
I’m afraid I got a 1.7 or 1.8mm drill bit broke-off and stuck in my second Si26 a few weeks ago. I managed to dig it out, but I’m not sure what size the hole is now, because I slung it back in the box with the hump. I’ll take your lead now; not much tweaking been going on during this very wet and windy weather anyway, but there’ll be decent weekends to come. I'm looking forward to seeing what you discover.
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Post by pxguru on Dec 3, 2016 11:08:51 GMT
I have not been slacking on this. And I have actually made some progress.
All sorts has been tried. Differnt carb bodies, a 2mm jack up kit for the float bowl, many variations of atomiser and air corrector. All no good. I was determined to find a solution that ran with the SI26/26 drilled to 2mm and the standard drilled air filter.
I still need to make the final round of tweeks, motorway sessions and plug chops at 1/4, 1/2 and WOT but so far so good.
The set up now. SI26/26E carb. 2.0mm drilled MJ hole, Drilled air filter, 50/160 pilot, 205 Air Corrector, BE2+2 (1.5) Atomiser, 132MJ, 04 slide, working Autolube
The BE2+2 (1.5) is actually made from a BE1 with its four holes drilled to 1.5mm and another 4 x 1.5mm holes on the row up and another 2x1.5mm on the top row. The AC205 is an AC160 drilled out with a 2.0mm drill which is a loose fit.
Seems like with all the tuning and the 2.0mm MJ channel, it takes a lot of air to stop it sucking on the MJ from tickover. I havent got a rev counter on it and the speedo is garbage but it feels like its revving to near 8000 rpm. I would say we are getting near the limit of the SI carb now.
Is really feeling quite good now riding crisp and very strong. Had it up at speed a few times and it didnt sieze up. Needs only slight tweeking now I hope. 55/160 pilot is next. Will continue working on it.
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