Joined
·
2 Posts
Hi all,
I am restoring an 85 TRX 250 Fourtrax for my friends son. As I have been stripping it down for a complete top end overhaul and cam chain replacement I noticed when I pulled the jug it Mic's out at 74mm. Now as I'm shopping pistons I see 66mm was the standard bore size of an 85 year model. After checking both engine and frame serial #'s I do indeed have an early run 85 model.
My question...was there a big-bore kit available for these back in the day?
Or, did another Honda model have a larger bore that was a direct fit?
Basically, I need to figure out what piston to buy that would take me .025 over so I can have the jug bored.
Any help is appreciated!
I am restoring an 85 TRX 250 Fourtrax for my friends son. As I have been stripping it down for a complete top end overhaul and cam chain replacement I noticed when I pulled the jug it Mic's out at 74mm. Now as I'm shopping pistons I see 66mm was the standard bore size of an 85 year model. After checking both engine and frame serial #'s I do indeed have an early run 85 model.
My question...was there a big-bore kit available for these back in the day?
Or, did another Honda model have a larger bore that was a direct fit?
Basically, I need to figure out what piston to buy that would take me .025 over so I can have the jug bored.
Any help is appreciated!