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Vespa RB250
Posted: Mon Nov 19, 2012 9:30 pm
by dopeshots
I was wondering if its possible to fit an RB250 kit on a Vespa?
Just a thought... Any ideas on crank etc
Cheers Russ :fb:
Re: Vespa RB250
Posted: Mon Nov 19, 2012 10:08 pm
by jonny snatchsniffer
why ? get a smallframe and falc it, im sure if falc had done a decent kit for a p range oz wouldnt have fitted a ts1 to a t5 motor
but since you ask anything is possible if you have the money
Re: Vespa RB250
Posted: Tue Nov 20, 2012 9:13 pm
by dopeshots
jonny snatchsniffer wrote:why ? get a smallframe and falc it, im sure if falc had done a decent kit for a p range oz wouldnt have fitted a ts1 to a t5 motor
but since you ask anything is possible if you have the money
Well I have never heard of anyone doing an RB250 so thought I'd ask the question......
Re: Vespa RB250
Posted: Tue Nov 20, 2012 10:52 pm
by OzOAP
I looked into it, got hold of a shagged cylinder and I have a set of T5 casings ready and waiting.
When I did the PTS1E, I used a 120mm con-rod and had to take 7mm off the bottom of the TS barrel.
Due to the inlet port on the RB, is isn't possible to take 7mm off the bottom.
I looked around for a longer (125mm+) rod but couldn't find one, so gave up on the idea.
Re: Vespa RB250
Posted: Wed Nov 21, 2012 7:25 am
by dopeshots
Well that answers that lol.. thanks for letting me know
Re: Vespa RB250
Posted: Wed Nov 21, 2012 12:29 pm
by Darrell Taylor
OzOAP wrote:I looked into it, got hold of a shagged cylinder and I have a set of T5 casings ready and waiting.
When I did the PTS1E, I used a 120mm con-rod and had to take 7mm off the bottom of the TS barrel.
Due to the inlet port on the RB, is isn't possible to take 7mm off the bottom.
I looked around for a longer (125mm+) rod but couldn't find one, so gave up on the idea.
there are some 125mm + rods ive found or a different piston crown height could help you achieve the build
Re: Vespa RB250
Posted: Wed Nov 21, 2012 8:10 pm
by OzOAP
Would be interested in the long rod rather than 'long' piston route.
Won't ask you to tell me what the long rod is from, but how much you would supply one?
Looking at starting a project in the new year. Got a garage full of Vespas, and havn't built anything new for 6 years!
Re: Vespa RB250
Posted: Sun Jan 27, 2013 11:42 am
by grimspeed
I take it it was a rotax rod you used ?
could you go up to a 24mm pin and use a steped pin 22mm-24mm?
Like martin is using on my 68mm stroke Lamby crank .
Re: Vespa RB250
Posted: Sun Jan 27, 2013 12:09 pm
by mick1
There was a set vespa 200 casings on e-bay a couple of weeks ago. Modified to take a TS1 etc...