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Re: lambretta 290 rotax

Posted: Mon Feb 18, 2019 3:45 pm
by czeckson
Image

Re: lambretta 290 rotax

Posted: Mon Feb 18, 2019 5:55 pm
by holty
garry inglis wrote:
Tue Feb 05, 2019 6:52 pm
whats the rubber cap with the spring clip steve is that for coolant
its the rave valve garry, works off exhaust pressure which lifts the valve up and down to alter the exhaust port timing, gives more torque at low revs and more power at high revs, a bit like a turbo on a car, first test ride was Saturday and its very very quick, did a power wheelie in second gear without even trying, its got way more power than it had before, and that was 35bhp, I still have the bigger carb to fit as well, that will got on when I get martin at chiselspeed to dyno it for me, I just want to get some miles on it first.
Image51960891_2311882732387243_4544355083143348224_n by stephen holt, on Flickr

Re: lambretta 290 rotax

Posted: Mon Feb 18, 2019 5:57 pm
by holty

Re: lambretta 290 rotax

Posted: Thu Apr 04, 2019 3:24 pm
by Wayne Miller
Cool project, have you thought about using an ignitech device for powervalve control instead of the diaphragm? I used one on my 50 special. they're pretty cool bits of kit. They control your PV Blade from the ignition so you can map it by RPM/Degree's

I'll grab a coffee and a packet of crisps and read this from start to finish tonight :)

Re: lambretta 290 rotax

Posted: Thu Apr 04, 2019 9:42 pm
by holty
im just running it in at the moment, by the time I get back from knarseborough it will be, I quite liked the idea of the valve been self governing, but I see how a programmable ecu would be of benefit, im looking forward to getting the big carb on and getting it on martins rolling road and see what power it has, it realy is a torque monster and such fun to ride.

Re: lambretta 290 rotax

Posted: Thu Apr 25, 2019 9:44 pm
by holty
went to scarborough scooter rally, ran very well, ive done 500 miles now since rebuild, big carb going on next, then dyno time
ImageUntitled by stephen holt, on Flickr

Re: lambretta 290 rotax

Posted: Sun May 12, 2019 9:11 am
by holty
got my 38mm carb fitted and took my scooter to martin at chiselspeed to get it set up correctly, got it on the rolling road and it managed 40bhp very pleased, took it for a ride yesterday and it is awesome, the blue line is my trace from last year and the red one is the results on Friday
ImageUntitled by stephen holt, on Flickr
ImageUntitled by stephen holt, on Flickr

Re: lambretta 290 rotax

Posted: Sat May 25, 2019 7:36 am
by RManson
Nice results Holty! Glad to see you're still getting after it!

Re: lambretta 290 rotax

Posted: Sun Jun 02, 2019 9:01 am
by holty
RManson wrote:
Sat May 25, 2019 7:36 am
Nice results Holty! Glad to see you're still getting after it!
cheers ryan, its running very well, just getting more miles on it, hows yours going ?