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jkv45 · August 19th, 2019, 07:00 AM

From this weekend's track day at US Air -

Had the track to himself for almost 2 hours at one point. The Aprilia didn't materialize.

He said the CRF150R (4-stroke) is faster than a similar CR85 (2-stroke). I expected they would be almost exactly the same.

We have done a few small mods to the CRF, but it's mostly stock. Last time at home we replaced the (weak) single-piston front caliper with a 450 dual-piston caliper - which helped a lot. Also removed the wire mesh inside the air filter frame and increased the Main Jet to compensate. All improvements so far.

Suspension is next on the list.

August 19th, 2019, 07:00 AM	#39
jkv45 Rev Limiter Name: Jay Location: WI Join Date: Jul 2013 Motorcycle(s): '06 SV650n, '00 Derbi GPR, '64 CA77 Dream 305, '70 CL450 Scrambler, numerous dirt bikes Posts: A lot. MOTM - Jun '18, Oct '16	From this weekend's track day at US Air - Had the track to himself for almost 2 hours at one point. The Aprilia didn't materialize. He said the CRF150R (4-stroke) is faster than a similar CR85 (2-stroke). I expected they would be almost exactly the same. We have done a few small mods to the CRF, but it's mostly stock. Last time at home we replaced the (weak) single-piston front caliper with a 450 dual-piston caliper - which helped a lot. Also removed the wire mesh inside the air filter frame and increased the Main Jet to compensate. All improvements so far. Suspension is next on the list. Last futzed with by jkv45; August 19th, 2019 at 09:08 AM.
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