lambretta 290 rotax

Anything related to Lambretta or Vespa Scooters fitted with LC, Motorcycle and/or Auto engines!
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garry inglis
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Thu Jan 18, 2018 11:51 am

Have you managed to mig weld that holty looks solid

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drunkmunkey6969
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Thu Jan 18, 2018 10:19 pm

Mint


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holty
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Thu Jan 18, 2018 10:32 pm

yes its mig welded, not realy tidy but i tried to make it as strong as possible, with added support where it cannot be seen.

Adam_Winstone
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Thu Jan 18, 2018 11:00 pm

Nice work :)

holty
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Sun Feb 18, 2018 11:00 am

not posted for a while, had a problem with the kickstart and bent the shaft, so i decided something stronger was needed so martin from chiselspeed got me a casa one from one of there new wider sidecasings which is the size i need, also came with an extended piston , so no need to extend the slot and use a packer, got it fitted, had to grind just a tiny bit of clearance to miss the clutch top plate, fitted kickstart and the splines in one or the other where not right, either too high or too low, so i ended up fitting a kickstart ramp to the side case an cutting the one off the backplate, pleased to say thats got the kickstart where it should be and works fine. as the engine is not run in yet, and its cold still i have opted to build a roller starter to back the scooter onto, which bump starts it, got that finished yesterday, so tried it out and it works a treat, its powered by a honda go kart engine and uses a centrifugal clutch which drives two rollers, i will post some more pics when i have time, road test went well ran at 40/ 50 degrees on the gauge and didnt miss a beat, does seem a bit louder with the bigger stinger but well pleased, pulls hard with no revs at all, its all torque, fun to ride, will try and get out later if it dries up,
holty
ImageUntitled by stephen holt, on Flickr
this is the original shaft and is bent like a banana
ImageUntitled by stephen holt, on Flickr
this is the new shaft fitted
ImageUntitled by stephen holt, on Flickr
new shaft with integral ramp, had to elongate the holes and trim one end to get it to work correctly
ImageUntitled by stephen holt, on Flickr

ImageUntitled by stephen holt, on Flickr

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LI150
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Sun Feb 18, 2018 11:54 am

Wish I had half your talent

Adam_Winstone
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Sun Feb 18, 2018 3:54 pm

I also like the fact that you've upgraded the endplate and sidecasing for adjustment and to take the load off the endplate. Might be a little upgrade but make for a big improvement :)

holty
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Sun Feb 18, 2018 5:11 pm

Adam_Winstone wrote:
Sun Feb 18, 2018 3:54 pm
I also like the fact that you've upgraded the endplate and sidecasing for adjustment and to take the load off the endplate. Might be a little upgrade but make for a big improvement :)
i thought the same adam, ive just got home did about 30 miles on it, i could feel the warm air on my legs at first, as the heat from the radiator was blown through the toolbox, couldnt later as my legs got so cold, i only had normal trousers on, no problems to report, but it does vibrate a lot at about 45mph, in 4th gear, it does seem to smooth out a bit as the revs rise, but im running it in and dont want to overdo it, plus ive not done a plug chop yet, mainly as its almost impossible to get the bleeding plug out when it hot, i intend to try some mountings out of an old engine and see if they are an improvement, maybe some foam grips might help, ive only got the standard plastic ones on at the moment, any recomendations ?
i took a couple of pics
the radiator seems to work very well by the way, around 40 degrees max so probably a bit too cool, will sort that later, i didnt fit a stat as i thought it would run hot.
ImageUntitled by stephen holt, on Flickr
ImageUntitled by stephen holt, on Flickr
ImageUntitled by stephen holt, on Flickr
ImageUntitled by stephen holt, on Flickr

holty
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Tue Feb 20, 2018 6:13 pm

i changed the large af mounting for an old one out of my rb250 and what a difference, very smooth now and so much nicer to ride, did about 10 miles and ran fine, its more tempting to open it up now its smoother but i must resist....
for now,
holty

holty
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Sat Mar 03, 2018 10:36 am

took it out for another ride on saturday, i knew bad weather was on the way and i had some free time, did about 20 miles and it ran fine, no issues at all, but i have noticed that the right hand side of my scoot is covered in oil, its the stand off coming from the carb, so i think i will be adding a bell mouth to the carb, and cutting a hole in the panel to suit, its not a big problem, but does need sorting at some point.
holty

ImageUntitled by stephen holt, on Flickr

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