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Post by RWS74 on Oct 27, 2016 12:11:42 GMT
Plug looking better overall. I would agree the main jet is 1 over, 105 would be better. A photo showing the root of the electrode would confirm this. No need to worry but next time I would put in a B6HS plug too. Could go a tad hotter. All the black oily stuff round the rim comes from running rich during low rpm use. I would think a 55/160 will make this way worse. What atomiser and AC are in, BE3 and AC160? It is a BE5 & AC140. That was what factory fitted. I bought bike with 288 miles and no Mods.
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Post by pxguru on Oct 27, 2016 17:46:25 GMT
Certainly no need for a bigger pilot jet then
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Post by RWS74 on Oct 27, 2016 19:42:28 GMT
Certainly no need for a bigger pilot jet then Ta, Fitted the NGK B6HS Plug, it started it first time and I rode around garage at work at 11:30 no issues. 4 hours later when I was set to go home it started first time then cut out as I put the choke in as I didn't hold the Revs..... Then it wouldn't start I tried for a while then tried to check for a spark and nothing!!! Tried kick starting, bump start, electric start the works thinking I'd flooded it but still no spark!?!?! Work mechanics checked coil, starter relay, and other components but no joy. I'm taking it to Scooter Works tomorrow. ?CDI or Sensor perhaps. Gutted. Proper Gutted.
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Post by pxguru on Oct 28, 2016 3:53:49 GMT
That is so disappointing. Could be something silly (you did try another spark plug!) but usually CDI or stator sensor.
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salo
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Post by salo on Oct 28, 2016 11:30:47 GMT
Love reading all the stuff on this post. I've never though about changing the pilot jet and the effects of doing so. I have a sip road 2, drilled filter and 110 main jet. It's a bit ropey at low revs but I'm under the impression that is one or the other.
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Post by RWS74 on Oct 28, 2016 13:54:20 GMT
Ta Gents what a day...
On duty 06:15. Booked AA to take scooter to Scooter Works in SE6.... they said it is CDI gone & can order one for tomorrow but suggested trying a couple of local shops.... I tried 17 in central London... finally found one in Motoden E8! Rode up on my job bike and bought it then rode to Scooter Works, attached it and hey presto!
I fitted it & also added 55/160 pilot just to see if it evens things out low revs.... if not will revert to 45/100 stock one.
Just need to get back to the shop when I finish in half hour or so. Can't wait to ride home.
Will update jetting/running progress soon.
Current Set up.
PX125E 2014 SIP 2 105 main jet 55/160 Pilot NGK BR6HS
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Post by bignico2411 on Oct 28, 2016 14:07:42 GMT
Salo, what colour is your plug? 110 mj sounds a tad high, what size was it pre-drilling?
RWS74, glad you got sorted! Let us know how it goes with the 105
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Post by RWS74 on Oct 28, 2016 18:49:06 GMT
Wow! Just wow! Rode home around 17 miles, stopped for fuel after 2 miles & adjusted air/fuel mix from 2 turns out to about just under half a turn inward then blipped throttle a couple of times to ensure it stayed same without changing speed & ensuring it retained smoothness. Then I increased idle speed a bit to a happy level and rode home. What a difference the 55/160 pilot made, it really smooths out the bottom end from pulling away at low revs and riding at low revs. Difficult to say if I noticed a difference from hotter plug as I fitted that & pilot together, also I suspect the plug will mainly be noticed on colour and hopefully lack of deposits if it's burning hotter on cross town 15 mile ride to work each way. I've got two more 30 mile commutes this weekend and will check plug afterwards for a rough guide and try to do a proper plug chop next week. Thank you all for your inputs & guidance & for any Londoners on here I can strongly recommend Scooterworks in SE6. g.co/kgs/auDDtiPX125E 2014 SIP 2 105 main jet 55/160 Pilot NGK BR6HS
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Post by salo on Oct 28, 2016 21:21:46 GMT
Salo, what colour is your plug? 110 mj sounds a tad high, what size was it pre-drilling? RWS74, glad you got sorted! Let us know how it goes with the 105 MJ was 102 Before drilling. I was worried about running lean. Will jetting down and changing idle jet make a difference?
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Post by RWS74 on Oct 29, 2016 5:46:26 GMT
Salo, what colour is your plug? 110 mj sounds a tad high, what size was it pre-drilling? RWS74, glad you got sorted! Let us know how it goes with the 105 MJ was 102 Before drilling. I was worried about running lean. Will jetting down and changing idle jet make a difference? Sounds like our bikes are same model. 2011 & 2014. Best way is to check plug to see what it tells you. If you have no other engine modifications then going down to 104 - 105 should be fine. Upping the idle jet has cured my horrible 1/4-1/2 throttle response while riding which is a lot of my riding in Central London. It smoothed things from closed to WOT and transformed the ride. Also started instantly on a cold start at 05:50 outside this am. Hope your tuning goes well.
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Post by RWS74 on Oct 29, 2016 5:46:40 GMT
Salo, what colour is your plug? 110 mj sounds a tad high, what size was it pre-drilling? RWS74, glad you got sorted! Let us know how it goes with the 105 MJ was 102 Before drilling. I was worried about running lean. Will jetting down and changing idle jet make a difference? Sounds like our bikes are same model. 2011 & 2014. Best way is to check plug to see what it tells you. If you have no other engine modifications then going down to 104 - 105 should be fine. Upping the idle jet has cured my horrible 1/4-1/2 throttle response while riding which is a lot of my riding in Central London. It smoothed things from closed to WOT and transformed the ride. Also started instantly on a cold start at 05:50 outside this am. Hope your tuning goes well.
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Post by pxguru on Oct 29, 2016 6:17:25 GMT
I am glad it is all going better. Part of this could be the new CDI the old one could have been failing for a while. I still think the 55/160 PX200 pilot will be too big for your 125. When it is the correct pilot jet the brass type mixture screw will be about 2.5 turns out. When pilot jets are a bit too weak they run terrible, make funny noises on run down, slow to drop to tickover and hesitate on pick up. When pilot jets are a bit too big they run fine, just drink loads of fuel and soot up the plug on city driving. Yours was possibly too small but now it will be too big. See how the economy and plug colour seem over the next few weeks.
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Post by bignico2411 on Oct 29, 2016 12:23:12 GMT
Salo, what colour is your plug? 110 mj sounds a tad high, what size was it pre-drilling? RWS74, glad you got sorted! Let us know how it goes with the 105 MJ was 102 Before drilling. I was worried about running lean. Will jetting down and changing idle jet make a difference? First thing to do is check the plug colour. Take a pic and post it up here, that'll give us an idea of where you are re jetting. tbh, I never touched my idle jet when I did this mod. Maybe I should have, the tech gurus on here will be able to confirm one way or the other.
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Post by salo on Oct 29, 2016 18:35:53 GMT
Not sure how to put a pic up, the mj was actually 108, I've now put a 105 in.
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Post by RWS74 on Oct 30, 2016 12:04:02 GMT
Not sure how to put a pic up, the mj was actually 108, I've now put a 105 in.
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Post by RWS74 on Oct 30, 2016 12:10:31 GMT
MJ was 102 Before drilling. I was worried about running lean. Will jetting down and changing idle jet make a difference? First thing to do is check the plug colour. Take a pic and post it up here, that'll give us an idea of where you are re jetting. tbh, I never touched my idle jet when I did this mod. Maybe I should have, the tech gurus on here will be able to confirm one way or the other. Ta Bignico will post pic when I do a proper plug chop, the last three commutes of 15 miles in early morning & evening across central London Traffic & 40mph dual carriageway have been the smoothest most responsive yet with constant power pull without hesitation from 1/8th to full throttle. The idle pilot jet does have a part to play in low end throttle opening. I found out when I tuned my Triumph Thruxton. Top end was lovely but when riding slowly in 2nd around 2000rpm it was really ropey. I upped pilot from 42 to 48 and the result was instant smoothness and consistent pull same as I've experience on my Vespa the last few rides.
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Post by salo on Oct 30, 2016 13:17:08 GMT
Not sure how to put a pic up, the mj was actually 108, I've now put a 105 in. is that an iPhone? I have a Samsung
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Post by RWS74 on Oct 30, 2016 13:20:04 GMT
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Post by bignico2411 on Oct 30, 2016 19:58:34 GMT
First thing to do is check the plug colour. Take a pic and post it up here, that'll give us an idea of where you are re jetting. tbh, I never touched my idle jet when I did this mod. Maybe I should have, the tech gurus on here will be able to confirm one way or the other. Ta Bignico will post pic when I do a proper plug chop, the last three commutes of 15 miles in early morning & evening across central London Traffic & 40mph dual carriageway have been the smoothest most responsive yet with constant power pull without hesitation from 1/8th to full throttle. The idle pilot jet does have a part to play in low end throttle opening. I found out when I tuned my Triumph Thruxton. Top end was lovely but when riding slowly in 2nd around 2000rpm it was really ropey. I upped pilot from 42 to 48 and the result was instant smoothness and consistent pull same as I've experience on my Vespa the last few rides. My post about a pic was aimed more at salo, mate, but let's get a look at yours anyway with the 105mj Didn't know the idle had an impact at low revs, cheers for the info. That Triumph is a feckin' beauty, by the way!
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Post by RWS74 on Oct 30, 2016 20:32:30 GMT
Ta Bignico will post pic when I do a proper plug chop, the last three commutes of 15 miles in early morning & evening across central London Traffic & 40mph dual carriageway have been the smoothest most responsive yet with constant power pull without hesitation from 1/8th to full throttle. The idle pilot jet does have a part to play in low end throttle opening. I found out when I tuned my Triumph Thruxton. Top end was lovely but when riding slowly in 2nd around 2000rpm it was really ropey. I upped pilot from 42 to 48 and the result was instant smoothness and consistent pull same as I've experience on my Vespa the last few rides. My post about a pic was aimed more at salo, mate, but let's get a look at yours anyway with the 105mj Didn't know the idle had an impact at low revs, cheers for the info. That Triumph is a feckin' beauty, by the way! Ta, I bought it a year old in 2005 for £4400 with just 847 miles on clock. Then I turned it into what you see in the picture & sold it 12 years later for £2400 3 months ago & bought my PX 125 2014 with just 288 miles for £2450!!! So my Vespa sorta only cost me £50!! Not bad either price really
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Post by RWS74 on Nov 3, 2016 2:21:50 GMT
Still yet to do a WOT Plug Chop however Signora Vespa is running really well & consistently.
I refueled last Friday after I replaced CDI & fitted the larger pilot jet. Since then I've done 188km on 6.52L = 81mpg... all in central London traffic around 16 mile commute twice a day.... that was pretty much my average fuel consumption on stock exhaust/carb set up so I'm very pleased with that.
I guess I'm not having to use as much throttle to get the power/acceleration I want and the engine is running more efficiently as it is breathing & fueling more...
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Post by salo on Nov 3, 2016 10:30:29 GMT
Still trying tout post a pic of the plug, tried tap talk but it doesn't ever load up. Any ideas?
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Post by pxguru on Nov 3, 2016 14:30:39 GMT
As long as you are happy with it that is all that matters. Would like to see the plug after 16 miles of city riding though.
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Post by RWS74 on Nov 3, 2016 19:44:43 GMT
Still trying tout post a pic of the plug, tried tap talk but it doesn't ever load up. Any ideas? These are pics of Salo's Plug after a ride, not a plug chop. MJ 108 I've posted them as his phone not posting pics.
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Post by pxguru on Nov 4, 2016 3:23:56 GMT
Although not terrible, still his is too rich. Need to do a WOT plug chop to get the main right but could drop this to 105 with little concern though.
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Post by henri on Nov 4, 2016 6:36:24 GMT
for me thats comfortably rich ,nice an safe with a wide margin for when the temps drop to true winter . wouldnt hurt to drop a main jet size tho just to see . there'd be little risk trying a 106 . an thats my tuppence worth . H
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Post by salo on Nov 4, 2016 11:06:20 GMT
Thanks Henri, I've got a 105 so I think I'll try that. I'll give it a run run tomorrow and then have a look.
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Post by salo on Nov 4, 2016 11:08:48 GMT
Thanks RWS for postING the pics and guru for your advice, the 105 will be tried out tomorrow. Btw does the plug type matter a lot?
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Post by henri on Nov 4, 2016 17:48:35 GMT
yes , do you mean the number or the make , both can matter . with vespas i stick with ngk ,with exception of t5's then its champions . the numbers altered by ya riding , all short town hops b6 , commute n faster blasts b7 , prolonged fast riding b8 . H
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Post by RWS74 on Nov 4, 2016 18:19:53 GMT
Re Plug.... our models need resistor plug...
i.e: with an R in Plug name.. NGK BR6HS Champion RL82C
I found out the hard way as I went to a well renowned bike/scooter shop who asked year of bike and gave me NGK B6HS.... I fitted it, rode around block and thought all was fine & dandy...4 hours later it wouldn't start and CDI was Kaput! Luckily a proper Scooter shop - Scooter Works in SE6 put me straight with Resistor plug.
We need NGK BR6HS for short journeys/town rides as it burns hotter & BR7HS for longer rides to Brighton etc.
I'll try and do Plug chop this weekend and post pics.
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