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Re: lambretta 290 rotax

Posted: Sun Jul 08, 2018 10:43 pm
by holty
Imageimage by stephen holt, on Flickr
all ready tp go to cleethorpes
when we got there just had to put the scoot on the dyno just to see what power its kicking out now with some stronger clutch springs fitted, im sure it had some clutch slip when martin set it up, also its got another 300 miles on it now and its loosened up a bit more, hope the video plays ok , it made 35 bhp
happy days
ImageUntitled by stephen holt, on Flickr

Re: lambretta 290 rotax

Posted: Wed Jul 25, 2018 5:44 pm
by holty
had a little ride out saturday to driffield, then went fo a ride to af rayspeed, scooter ran fine but it starting to get loud, end can needs re-packing
Imageimage by stephen holt, on Flickr

Re: lambretta 290 rotax

Posted: Tue Oct 09, 2018 9:25 pm
by holty
ImageUntitled by stephen holt, on Flickr

went for a ride to rayspeed today and look who took my scoot for a test ride, non other than mr ray kemp himself, he rode up the road one way, then did a ride past the shop in the other direction while overtaking a car, awsome was the word he used to describe the experience when he got back, when asked how fast he had gone, he said " off the clock about the ton" he also said how nice it rode, very high praise from a scootering legend, wish i had videoed it, great day.

Re: lambretta 290 rotax

Posted: Tue Oct 09, 2018 10:05 pm
by Toddy
What an honour , he’s still got it then :lol:

Re: lambretta 290 rotax

Posted: Wed Oct 10, 2018 8:43 am
by holty
Toddy wrote:
Tue Oct 09, 2018 10:05 pm
What an honour , he’s still got it then :lol:
yes a big honour, i had to go home on it

Re: lambretta 290 rotax

Posted: Wed Oct 17, 2018 5:32 pm
by holty
well ive done a thousand miles now so thought it was time for some maintenance, gearbox oil changed, exhaust was blowing a bit so thought i had best remove it and have a look
ImageUntitled by stephen holt, on Flickr
turned out the exhaust had a few splits so i welded it up, then welded a patch over it as well just to re-enforce it, one of the brackets was cracked as well so i added another plate and bracket to make it stronger
ImageUntitled by stephen holt, on Flickr
ImageUntitled by stephen holt, on Flickr
i have also replaced the rubber mountings with 3 of the same type and added one to the rear can to absorb more vibrations.
i also changed the carb rubber which was fouling on my clutch cable adjuster, screwed the adjuster in and shortened the cable so it doesnt touch now, a change of plug as well, looked quite good for a 1000 miles and never been out of the engine
ImageUntitled by stephen holt, on Flickr
had some leaking headnuts so added some copper washers, seems to have fixed that problem, got it off my bench today kicked off first time, still very loud but does sound sweeter, test ride tonight

Re: lambretta 290 rotax

Posted: Wed Dec 19, 2018 5:07 pm
by holty
ImageUntitled by stephen holt, on Flickr

this little baby has arrived from the states

ImageUntitled by stephen holt, on Flickr

and so the work begins on a little upgrade

ImageUntitled by stephen holt, on Flickr

same bore size but has a powervalve and a bigger boost port

ImageUntitled by stephen holt, on Flickr

Re: lambretta 290 rotax

Posted: Wed Dec 19, 2018 8:23 pm
by garry inglis
it will be good to see power difference steve maybe 40bhp

Re: lambretta 290 rotax

Posted: Wed Dec 19, 2018 10:35 pm
by holty
the cylinder is off a skidoo mach 1, they are usually between 95 to 100 bhp as a twin, I have a smaller carb so I would say 40 would be a conservative estimate, the exhaust port is considerably wider than the seadoo barrel which is on now, and the boost port is wider too, ive got a few more jobs to do before I get into it, but will keep updates coming.

Re: lambretta 290 rotax

Posted: Thu Dec 20, 2018 11:48 am
by Adam_Winstone
Nice work. I hope that the exhaust valve delivers the sort of delivery that I expect it to, which should really benefit the ride.

Great stuff.