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View Full Version : High Rpm Bog... HOw do you cure it?



300excrazy98
09-04-2006, 07:27 PM
High RPM Bog... Help me please also CR250 Ignition?
Hey guys my 295r has a bad bog in the high rpms... I cant go full throttle, but it doesnt stall when i do it just bogs down... I was thinking the jets..

Its got

295 bored out
duncan mx porting
hot rods crank
cases are machined out for a 340
keilhn carb 39mm??
some sort of alum. exhaust flange
bills header
lrd silencer
boysen rad valve


I was thinking that it was getting to much gas.. bc when i took the plug out it wasnt that oilly but had some gas on it.. so i thought back to when i bought it from the guy, and he said he had a 340 on it, so i doubt he changed the jets out of the carb.

Which jets would i need to change? would they need to be bigger or smaller? any sizes?

Also on the jets does it say what size they are?
thanks

09-05-2006, 10:14 AM
top end is dealing with the main jet.

i think it needs to be smaller

jsmith2232
09-06-2006, 06:38 AM
YOU NEED A SMALLER MAIN JET