10.25:1 in 200x

[averysdad]

I do a lot of slow riding with my kids 90 percent of the time I mean slow like 1st gear . If I use a 10.25 to 1 piston in my 200x will it over heat? Plan is to later get a mild can and cr200 carb when the kids are not around I would like it to be a little snappy.

[yaegerb]

no, it won't and you can get away with running 89 with 10.25:1. You won't need a bigger carb for that piston and cam, just re-jet.

[86125m]

no you are good if my 200m can run a high compression .75 over piston going slow without over heating you should be fine.

[big specht]

You might have a spark knock issue. At least I did on the one I built it wanted to spark knock until I ran 93+ gas

[averysdad]

I use 93 all the time anyway I don't ride much and I ride slow don't use much gas