So I picked up an '87 Elite 250, and the rollers are shot. I've been poking around the Net and getting some mixed info about the sizes. Apparently the stock is a weird in-between size, so sources list them as both 23X18 and 24x18, depending on where you look. Most say 24 for the Elite 250, 23 for the Helix, but then I've read they're the same, so I dunno... kinda' lost.
Anyhoo, it came with some little 3.5x10 tires on it that were not goners, but out of date, so I replaced them with some 190/20 Michelin Boppers. This is supposed to be the metric equivalent to 4x10's, which are listed as the correct size. Upon receiving the Boppers, they're noticeably taller tires. They fit, but definitely larger.
My thought is that, since the tires have a larger diameter anyway, I'll replace my rollers with 23x18s. Best as I can understand it, this will drop my gearing a hair if they're not the original roller diameter. BUT, I thought I might get heavier rollers to try to offset any top speed lost from the smaller diameter. Stock are 22.6g, maybe move up to 24g?
Does that make sense? Am I thinking correctly here or am I overlooking something?
Any input would be appreciated. This whole CVT is new to me, so diving straight into tuning is a little confusing. It wouldn't be so bad if I could get a straight answer on the stock equipment....
EDIT: Woops, yeah, 120/90....
~SM
