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Post by jellerby on Feb 25, 2017 20:29:16 GMT
My first and second gear seem to rev out quicker than before? What is the cause of that? It was at Chiselspeed for three weeks and then another week after. All the gears seemed to rev out a lot more and the following day after that. This past week first and second seem to rev out too quickly?
135 Malossi kit, ported and matched
Polini CP 24mm carb, everything tuned.
Been on the dyno doing under 14bhp
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Post by bryno on Feb 27, 2017 16:34:17 GMT
Nothing has changed on your gearing so either the 'tune' means you are getting up to speed quicker in each gear, or it is possibly revving slightly higger than it did before.
Or your clutch is slipping, but really you'd feel that and more likely to be in 3rd or 4th than lower gears
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Post by jellerby on Feb 27, 2017 17:10:44 GMT
Nothing has changed on your gearing so either the 'tune' means you are getting up to speed quicker in each gear, or it is possibly revving slightly higger than it did before.
Or your clutch is slipping, but really you'd feel that and more likely to be in 3rd or 4th than lower gears
I don't understand why it would suddenly change through the week though. Everything worked fine and pulled well when I went to pick it up and the following day and now this? It had a new reed valve and new carb slide while it was there. It was on the dyno for the third time doing just under 14bhp.. It doesn't seem to be ticking or revving any higher than before either?
First and second seem gutless at the minute if you know what I mean? I'm about to ride home soon will see how it goes then.. Disappointed.. I don't really know anything about tuned scooters.. I rebuilt one standard carb on my old P series.. 😞
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Post by jellerby on Feb 27, 2017 17:18:18 GMT
What causes the clutch to start slipping? It's a brand new clutch that was put in while it was at Chiselspeed. Is it just wear?
What's the fix? A new clutch? I don't think I could do that really, I'm a pure novice at it.
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Post by henri on Feb 27, 2017 18:05:54 GMT
its a tuned smallframe ,what clutch is in it , at 14bhp it will murder a stock one .a decent newfren/surflex 3 plate set up with a polini uprated spring is the bare minimum .i dont use mallosi springs after having problems with one in the past . H
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Post by jellerby on Feb 27, 2017 21:31:51 GMT
its a tuned smallframe ,what clutch is in it , at 14bhp it will murder a stock one .a decent newfren/surflex 3 plate set up with a polini uprated spring is the bare minimum .i dont use mallosi springs after having problems with one in the past . H I'm not entirely sure what clutch is in it at the moment, just looked through some receipts and it's got Malossi plates in it. If I were to change the clutch myself.. would it be fairly straight forward or would it be best taking it to a mechanic to fit? Im a complete novice at mechanics but willing to learn more about my scoot. I understand I'd need to take the PM tuning exhaust off of it to get the rear wheel off but im afraid it'd end up with an air leak or cause a problem... |
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Post by bryno on Feb 28, 2017 8:57:25 GMT
If the clutch was slipping i'm surprised they didn't pick that up on the dyno.
You need to check if it really is the clutch, easiest way to do this is stick it in 3rd, rev it and let the cluch out pretty quick, if it stalls immediately clutch is fine, if it revs and doesnt move or stall immediately, its the clutch slipping
If it is clutch slip I'd get it back to Chis to sort, if they fitted plates or springs not up to the tune, that's their issue. Yes you can do it yourself but it is a bit fiddly on a smallframe and you'll need a clutch puller and compressor.
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Post by jellerby on Feb 28, 2017 11:59:05 GMT
It's only started doing it after two days after I got it back.
I just asked a friend mechanic and explained what clutch slip is and he said it's revving and not pulling away basically which is what is happening.
Do you mean putting it in third on tick over and letting the clutch out?
I'd like to learn how to do it myself instead of taking it back since I've spent a lot of money and it's still not right.
I recorded a video on my trip to work this morning, I was thinking of emailing it over to Chis and seeing what they suggest.
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Post by bryno on Feb 28, 2017 14:50:28 GMT
Put in third, bit of rev and let the clutch out fairly quick but don't just dump it, it will either stall (good) or it will slip and not stall immediately and if its really bad it will just rev up without hardly moving
If you do want to do it yourself have a crack, its not rocket science, just a bit fiddly with the engine in the frame, and you'll need to get those 2 tools and ideally a flywheel holding tool if you can borrow one of them to.
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Post by henri on Feb 28, 2017 17:43:59 GMT
scooterhelp.com can walk ya through a clutch job ,an also vespasmallframes forum . basically ,exhaust off , block up back of scoot ,rear hub nut loosened. wheel off ,release brake cable an hub off .backplate off,3 nuts, dont pull cable all way out n prop to one side . can see clutch cover now ,clutch cable released , an cover bolts ,6, undone ,remove cover an dont lose plunger . get a old penny or 2p an use that to jam primary gears ,knock down tab washer in clutch centre an undo the centre nut .remove tab washer an replace nut loosely (finger tight) wind in a clutch centre puller ,all the way. then a large socket that fits over puller an inside oil thrower is used with the centre bolt of puller to compress the clutch so circlip can be released .undo that an thrower/plates an spring fall out . replacement is just a reverse of that ,soak plates in oil 1st ,replace cover an backplate gaskets ,  heres my set up for compressing a clutch ,the extra nut is because with stronger springs you need the whole length of bolt to start them .but it bottoms out before clutch is fully compressed ,leave out top plate an temprarily replace circlip ,undo bolt an add nut an it will compress enough to get top plate an thrower on . dont lose the penny into cases or anything else . H |
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Post by jellerby on Feb 28, 2017 18:45:54 GMT
My dad had a ride on it earlier and said it isn't slipping, he even wheelied it in first and a scooter shop mechanic said it won't be the clutch slipping?
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Post by bryno on Mar 1, 2017 10:32:49 GMT
That's good news then, so what exactly is happening, are you sure its not just revving higher and getting there quicker because its now set up properly?
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Post by jellerby on Mar 3, 2017 18:03:20 GMT
It's all properly set up by Chiselspeed, with an extra grand I've spent on it.
It's revving higher but not pulling anywhere like it did before? It doesn't seem to pull like it did last week.
It had happened before I was doing 51mph max but that wasn't revving out quick. Last week I was clocked at 75mph all gears pulling power smoothly and now it's not?
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Post by jellerby on Mar 4, 2017 17:28:01 GMT
Great.. Now the choke on the carb won't pull up... I give up..  |
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Post by mijapxman on Mar 4, 2017 20:17:46 GMT
Think I would be taking it back to chiselspeed ,especially after paying good money! They also had the carb apart if they changed the slide,so your choke problem may be down to them?
Don't give up,the down sides of tuning can make the good times sweeter(sometimes)😀 and most of us have felt like giving up at some point!😁😁
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