CRF450r or YZ450F

[2Wheels]

Honda (race bikes are) a maintenance nightmare.

I was just looking at the maintenance record on my 2010 250r
This is fresh crank valves cam and head 14:5:1 piston
8/25/16
0hr
int L .11 R .15
ex L .28 R .28

5/29/18
40hr

int L .10 R .16
ex L .28 R .28
Run that bitch

 

[PALMER84ONE]

Yep, intakes suck faster than exhaust.

Not sure of the hours on my Beta (have not scrolled through head unit) but it has over 5K miles so I would estimate over 200 hours.

Zero adjustments on the ex, one on the intake so far.

Only have 2 hours on my 17 WR250F. So don't have any data.

Maybe the guy with the 4 stroke yamaha 250 and 450 will chime in.

 

[2Wheels]

Well my ‘14 YZ250F had 80 when I got it and the intakes were zero’d out. Probably never been touched.

 

[snowflake]

CR500FAF