Search found 119 matches

by guygrrr
Wed Feb 06, 2019 4:25 am
Forum: Liquid Cooled, Motorcycle Engine & Automatics Section
Topic: lambretta 290 rotax
Replies: 182
Views: 27397

Re: lambretta 290 rotax

At the expense of stealing Holty’s thunder, his new cylinder uses a vacuum actuated exhaust valve. The black plastic is the cover for the vacuum diaphragm. It’s a neat upgrade and should give his bike more bottom end.
by guygrrr
Sat Dec 15, 2018 5:48 am
Forum: Vespa Tech
Topic: 177cc/si20/20
Replies: 2
Views: 505

Re: 177cc/si20/20

You can run it with a 20/20, no problem. The benefit of the larger carb would be to provide more air flow, and correspondingly, more fuel. This allows for higher RPMs and more speed. But with the smaller carb you would expect to see better throttle response and performance off the line. This is due ...
by guygrrr
Fri Jan 26, 2018 2:46 am
Forum: Tech FAQ
Topic: Lacking performance at top end
Replies: 15
Views: 1385

Re: Lacking performance at top end

As I said, the oil will smell burnt, depending on how long the plates have been slipping. But once you’ve drained the oil it would be pretty obvious and quite pungent. Also the corks may appear black or very dark brown, and sort of glazed and shiny. I consider plates and springs to be a pretty cheap...
by guygrrr
Thu Jan 25, 2018 3:56 pm
Forum: Tech FAQ
Topic: Lacking performance at top end
Replies: 15
Views: 1385

Re: Lacking performance at top end

Fwiw, I’m also thinking slipping clutch. So, you absolutely can have this problem only at high rpm. And the increased heat you describe would make sense as all the clutch is doing at that point is making a boat load of friction. Drain the oil. Does it smell burnt? Get your self a few more clutch pla...
by guygrrr
Wed Oct 25, 2017 1:33 am
Forum: Liquid Cooled, Motorcycle Engine & Automatics Section
Topic: lambretta 290 rotax
Replies: 182
Views: 27397

Re: lambretta 290 rotax

Maybe I missed it somewhere, but why do you have 2 fuel flaps?

Super build btw!
by guygrrr
Fri Dec 23, 2016 6:45 pm
Forum: Vespa Tech
Topic: Going 12V with a '62 Sportique
Replies: 2
Views: 856

Going 12V with a '62 Sportique

Righto, got a '62 Sportique that has a new loom. I want to go 12V and CDI instead of points I'm guessing I need a regulator for the lighting Is the Beedspeed kit any good ? https://www.beedspeed.com/vespa-electronic-supersprint-p-1675.html?osCsid=hk3u5ciaqjrpp5drcramifu3m0 https://www.beedspeed.com...
by guygrrr
Thu Mar 17, 2016 1:18 am
Forum: Vespa Tech
Topic: px longstroke 125cc
Replies: 3
Views: 1267

Re: px longstroke 125cc

Yeah, you'll be fine. I run a long stroke Pinasco. Originally it was on a 23/65 P200 combo, but it would struggle to accelerate well in 4th even with a short 4th gear. Iirc I dropped the clutch gear to a 22 and the 4th back to a 35 tooth gear. That's enough to keep it on the power even up steep hills.
by guygrrr
Fri Feb 05, 2016 4:56 pm
Forum: Vespa Tech
Topic: px longstroke 125cc
Replies: 5
Views: 1377

Re: px longstroke 125cc

You'll see an improvement stroking any of those cylinders. But it's not as if one is better than other as the cylinders are designed to produce power differently. I can only directly comment on the Malossi and Polini. The Malossi is a still a rev monster, if a bit less so and the Polini is quite a b...
by guygrrr
Wed Jan 13, 2016 3:49 am
Forum: Show us yer Scoots!!
Topic: NOS TS1
Replies: 80
Views: 29871

Re: NOS TS1

Very trick! It's nice to see it coming along.
by guygrrr
Sat Nov 28, 2015 6:51 pm
Forum: Vespa Tech
Topic: 1980 Vespa P200e electrical question
Replies: 5
Views: 1258

Re: 1980 Vespa P200e electrical question

Only the headlight runs AC.