Search found 213 matches

by Jack221
Mon Sep 05, 2016 7:31 am
Forum: Vespa Tech
Topic: Inlet Timing
Replies: 10
Views: 2698

Re: Inlet Timing

You've touched on so many subjects all at once, I don't know where to start ;) This inlet timing thing is something that keeps on coming up though. I think Joey's 80 degrees ATDC is ok. Norrie wrote that book a long time ago. Like you implied with modern thinking, it could do with a bit more BTDC, p...
by Jack221
Sun Sep 04, 2016 9:02 am
Forum: Vespa Tech
Topic: Inlet Timing
Replies: 10
Views: 2698

Re: Inlet Timing

It's all about rpm. The higher it revs the more you need. 90 degrees is probably good for 10,000 rpm
by Jack221
Sun Sep 04, 2016 8:49 am
Forum: Vespa Tech
Topic: Px125/150 upgrade.
Replies: 11
Views: 2574

Re: Px125/150 upgrade.

Sounds like a really good set up. That BGM 177 is a really high rpm quality kit. When combined with a 60mm Mazz crank its going to scream even higher. This is a good thing. Will never pull a PX200 gearbox, so forget that idea. As it will rev so high it should be fine with the 21/68 and a 36 tooth 4t...
by Jack221
Mon Jul 04, 2016 6:36 pm
Forum: Vespa Tech
Topic: Flat spot
Replies: 4
Views: 1075

Re: Flat spot

Flat spots like you describe are usually due to running weak at low revs. If it has all the right jets then air is getting in somewhere. Usual suspects are one of crank oil seals, carb/carb box gasket or base gasket.
by Jack221
Mon Jun 13, 2016 8:30 am
Forum: Vespa Tech
Topic: Weird one!
Replies: 5
Views: 1509

Re: Weird one!

Probably because the float bowl level will appear to be higher for the jetting. Try a 55/100 if you are running with no air filter
by Jack221
Sun Jun 12, 2016 7:03 pm
Forum: Vespa Tech
Topic: Weird one!
Replies: 5
Views: 1509

Re: Weird one!

A lot of work you have done for what sounds like a jetting problem. What pilot jet is in it now? If is starts and ticks over ok then its normally just the big number of the pilot jet that is too big.
by Jack221
Sat May 28, 2016 7:25 am
Forum: Vespa Tech
Topic: Vespa P200e top mph in each gear...
Replies: 7
Views: 2289

Re: Vespa P200e top mph in each gear...

It might be too early in the morning but what is your issue? If your p200 is just not fast enough, then you came to the right place :)
by Jack221
Fri Apr 15, 2016 10:03 pm
Forum: Vespa Tech
Topic: Clutch f@@ked - engine?
Replies: 19
Views: 3268

Re: Clutch f@@ked - engine?

I expect the clutch would have been rubbing on the clutch cover when the nut was loose before it spun on the key and jammed. Post a picture of the inside of the clutch centre that you took off and we should see that it is a bit of a state in there around the keyslot.
by Jack221
Fri Apr 15, 2016 5:00 pm
Forum: Vespa Tech
Topic: Clutch f@@ked - engine?
Replies: 19
Views: 3268

Re: Clutch f@@ked - engine?

Saw the video. Its just your crank moving in the main bearing. The crank should fit into the bearing tighter than that. Try it with a clutch tightened on and see how much float there is. At some point it has been running with the clutch nut loose and thats worn all the parts.
by Jack221
Sun Mar 27, 2016 1:09 pm
Forum: Vespa Tech
Topic: Clutch Slip Fix - plates & springs
Replies: 2
Views: 698

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...