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Found 3 results

  1. Hi everyone, this is my first post and I need some help with my TZR 50, it has a polini 80cc bore kit, technigas expansion chamber, bored out reed block with polini carbon reeds, high spec inlet manifold, 21mm TNT carb with a polini sponge air filter. I've only just put the carb on, previously was the standard 16mm, it went fine but I always knew it could do more as the powerband was tiny and right at the top of the rev range, now with the bigger carb the powerband is much bigger (and a bit more powerfull) but a lot lower down the rev range and it starts to run out of puff at about 9250rpm whereas before it could pull to 10250, if anyone could sugest anything I would appreciate it alot, thanks! : )
  2. Hi everyone! Its been bugging me for a while now and hopefully this will get it sorted. My question is, does exhaust packing (the fiber glass stuff in the tail can) make any difference to performance, is it best to have it in or not and would an upjet or something be required if removed, or is it just purely a noise reducer?
  3. I currently obtained a 1977 Yamaha Chappy lb80 from my dad. it was sitting there for a long time and does not currently run. i took it to the shop this morning to have them get it running again. my question is this. after i get it back, is there anything that i can do get more power out of it? obviously keep a clean filter in it, but is there anything else that i can do besides boring out the cyliders? thank you in advance!!! sincerely, happy_chappy_owner p.s. I know these machines were not made for a lot of speed, but i would like to get a little extra "oomph" so to speak as i am right at 200 pounds.
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