Search found 214 matches

by Jack221
Sun Mar 27, 2016 1:09 pm
Forum: Vespa Tech
Topic: Clutch Slip Fix - plates & springs
Replies: 2
Views: 722

Re: Clutch Slip Fix - plates & springs

Do you think your scooter is only 25% faster than standard? ;) I have had similar issues with mine. Tried many combinations but in the end it's all about the springs. I suggest to just get a set of these XXL from SIP and it will never be an issue again. http://www.sip-scootershop.com/en/products/clu...
by Jack221
Sun Feb 14, 2016 12:12 pm
Forum: Vespa Tech
Topic: PX200 bogging off idle
Replies: 13
Views: 3210

Re: PX200 bogging off idle

The old non autolube P200E used to have a 48/140 idle jet. The 55/160 can be a bit rich for some, even standard no two engines are exactly the same. First jet I would try would be a 52/140. The mixture screw will need to be re-adjusted to get the slow running correct.
by Jack221
Mon Feb 08, 2016 12:42 pm
Forum: Vespa Tech
Topic: PX200 bogging off idle
Replies: 13
Views: 3210

Re: PX200 bogging off idle

I'm sure someone said this before on here but getting the SI pilot jet right is not so simple. The next jet weaker from 55/160 on a P200 is not 40/120 thats for sure.
by Jack221
Sat Feb 06, 2016 5:54 pm
Forum: Vespa Tech
Topic: PX200 bogging off idle
Replies: 13
Views: 3210

Re: PX200 bogging off idle

What size pilot did you try? And what happened with it?

If it clearly runs rich and starts badly with a 55/160, then its not the right jet for your engine.
by Jack221
Sat Feb 06, 2016 8:08 am
Forum: Vespa Tech
Topic: PX200 bogging off idle
Replies: 13
Views: 3210

Re: PX200 bogging off idle

Sounds like you have the wrong pilot jet to me. What one is in it?
by Jack221
Mon Jan 19, 2015 11:32 am
Forum: Vespa Tech
Topic: t5 engine
Replies: 10
Views: 2522

Re: t5 engine

lambro wrote:
soulboy wrote:keep the timing stock someone on here told me to change it when i put a malossi on it and it cost me a piston :evil:
I run all my tuned Vespa's at 16.
More than just timing that can hole a piston.
Proving the rule that advancing the timing will need bigger jetting!
by Jack221
Mon Jan 19, 2015 11:27 am
Forum: Vespa Tech
Topic: t5 engine
Replies: 10
Views: 2522

Re: t5 engine

Sounds to me like Fastfrog was first talking about port timing. If you want it to go as fast as possible then a 1.5mm base gasket. For city riding a 0.5mm base gasket. Decide what kind of riding you want it for, then get the head sorted to give a squish of no more than 1.0mm.
by Jack221
Tue Dec 02, 2014 9:29 pm
Forum: Vespa Tech
Topic: Mixer Tubes SI Carbs
Replies: 19
Views: 7297

Re: Mixer Tubes SI Carbs

The mixer tube does the same job as the needle and atomiser in a PHBH or similar. Once you work out whats what, then tweeking the mixer tube by drilling a few more holes in the right area does the trick for tuned engines.
by Jack221
Fri Oct 03, 2014 7:39 am
Forum: Vespa Tech
Topic: carbon clutch plates
Replies: 11
Views: 1401

Re: carbon clutch plates

I still have the carbon plates in mine and they are great. No slip or judder :) I think the springs are the issue with yours. Just strong springs are not enough. I have ten of the SIP XXL springs http://www.sip-scootershop.com/en/produ ... a_93122000
by Jack221
Wed Sep 17, 2014 7:24 am
Forum: Vespa Tech
Topic: Engine Build - Advice needed
Replies: 18
Views: 4495

Re: Engine Build - Advice needed

Did you up 2nd gear too? If not it will be quite a jump between 2nd and 3rd, like an old 3 gear V90 ;) At least its one way to get over the pulling in 4th issue. Richjak, What I do is install a standard 65 ring gear then it is possible to use a 21, 22 or 23 clutch to easily change the gearing withou...