Thank you for your help with my 87 570cc yamaha,
after I cleared the jets out, it now runs\starts like a champ!!
What is the rule on jet sizes as far as altitude?
do you need smaller jets the higher you go?
Who sells them mail order?
Thanks for the help

Hello, After Re-building the top and bottom end on my 87 570cc, my sled runs poorly, it has good compression, but starts hard and has very little throttle response, it also backfires some...Where could I have gone wrong?? any advise would be helpfull, Thanks!!