135cc conversion

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135cc conversion

Post  Scooter Paul on Wed Mar 13, 2013 5:40 am

Sometime I'm going to need a rebore of my 125cc Cometa. It appears that oversized 125 pistons are scarce (I'm already on an oversize). What's entailed in a 135cc conversion? Are there any drawbacks. I don't really want more power it's just that in the future I will need a rebore.
Having said that I could get away with new rings for a while. Are 125 rings available? From memory I think I'm up to 57.6 already.

Paul
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Re: 135cc conversion

Post  daz.h on Wed Mar 13, 2013 8:25 am

paul, rings will be no problem to get hold of, when i did a 125cc conversion years ago i was missing some rings, just used gp 150 items.
pistons for the 135 i think came from a kawasaki kh400 and from memory these are not only hard to find but expensive when you find them.
another option would be a tv175 piston and rebore as shown in ken herlingshaw lambretta tuning manual.
daz
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Re: 135cc conversion

Post  Scooter Paul on Wed Mar 13, 2013 1:04 pm

Thanks Daz. I'll try some GP 150 rings first.

Paul.
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