Rotax 300 builld

Anything related to Lambretta or Vespa Scooters fitted with LC, Motorcycle and/or Auto engines!
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TED CRUD
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Tue Oct 18, 2016 9:18 pm

Just a load of parts Holty ,i will start my own thread when its moving along .Meanwhile i will sit back and enjoy RMason`s epic journey :)
Smash Ya Pastie
Washington Posse s.c
https://www.youtube.com/watch?v=ZrBpNEjkuLY

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RManson
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Tue Nov 15, 2016 5:06 am

Finally got my head around the electric starter after having a ton of little issues. Turns out 3rd time's a charm as I've machined and adapted at least three different starter configurations before settling on the final setup, which consisted of a modified Aprilia RS125 starter bendix with KTM 450 idler gear, a KTM 450 starter and one-off mag housing. The Aprilia RS125 flywheel and ring gear wear also modified to suit.

With the final piece of the puzzle now complete it's time to shake things down for a bit and then move on to detail and final assembly.

ImageRotax Lamby build-180 by PotvinV8, on Flickr

ImageRotax Lamby build-181 by PotvinV8, on Flickr

ImageRotax Lamby build-182 by PotvinV8, on Flickr

ImageRotax Lamby build-183 by PotvinV8, on Flickr
Last edited by RManson on Thu Aug 31, 2017 12:21 am, edited 1 time in total.

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RManson
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Tue Nov 15, 2016 6:41 am

Of course it wouldn't be complete without the video...


ImageRotax Lamby build-184 by PotvinV8, on Flickr
Last edited by RManson on Thu Aug 31, 2017 12:22 am, edited 1 time in total.

holty
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Fri Nov 18, 2016 2:29 pm

nice work ryan, sounds sweet, i bet your pleased after all that hard work, im going to stick with the original kickstart on mine.

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RManson
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Sun Nov 20, 2016 9:00 am

:D
Last edited by RManson on Thu Aug 31, 2017 12:12 am, edited 1 time in total.

gerryjunior
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Sun Nov 20, 2016 11:15 am

some fantastic work on this scoot, i've enjoyed following this , well done and enjoy.

psychedelicropcircle
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Sun Nov 20, 2016 12:53 pm

sounds the bizness when you building me one :shock: :lol:

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Rich_T
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Tue Nov 22, 2016 10:23 pm

An epic job and an epic journey, superbly done!

Mr G in NYC
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Tue Nov 22, 2016 10:28 pm

IMPRESSIVE job , well done !

G.

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RManson
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Wed Feb 08, 2017 6:14 am

Thanks guys!

Not a whole lot going on, just working out a handful of kinks in preparation for the Rides of March here in California in a few weeks. Having put a few miles on the bike, one of the things that really bugged was the shifting. I never really cared for how far the gearshift traveled between first and fourth and with drop bars, it's even worse, so improving that has been the biggest goal as of late.

My solution was to fabricate the largest pulley i could fit under the headset and narrow the shift cross on the engine case. The results are a close-ratio set up (of sorts) with surprisingly easy effort. I figured that a fair bit of leverage would be loss due to the resulting ratio between the shift cross and the lever itself, but it seems to be pretty negligible. I machined a new adjuster block from scratch and incorporated an adjuster for the rearset brake as well, while taking care to ensure that the cables all end up nice and in line with the rod ends, etc. My last attempt suffered from misalignment issues, so this was important to the success of the overall design. Anyways, here are a few pics...

ImageRotax Lamby build-185 by PotvinV8, on Flickr

ImageRotax Lamby build-186 by PotvinV8, on Flickr

ImageRotax Lamby build-187 by PotvinV8, on Flickr

ImageRotax Lamby build-188 by PotvinV8, on Flickr

ImageRotax Lamby build-189 by PotvinV8, on Flickr
Last edited by RManson on Thu Aug 31, 2017 12:24 am, edited 1 time in total.

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