A place for Monkey Bike and Mini Bike (including Grom/MSX) enthusiasts. This will be moderated in accordance with C90Club rules. Welcome!
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Posts: 84
Joined: Tue Jun 23, 2015 10:37 am
Rides:: indian powerplus 1921 and monkeybike
Location: berkshire


Post by powerplus » Sat Aug 15, 2020 6:51 am

hi all i have just made my Chinese 90 monkey into a 110 by swapping the barrel and head form a older engine

i also ported the head at the same time

it runs really well and pulls to 45 quickly but its screaming at 45 in top

is the gearing in some engines different ?

the sprockets i have are 17t 29t 420 with 8" wheels and was wandering if the 26t rear sprocket would make a big difference

i have seen a 19t front sprocket on amazon but from memory 18t is about as big as you can fit

thanks in advance


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