Thread: Derbi GPR
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Old May 4th, 2015, 01:18 PM   #20
jkv45
Rev Limiter
 
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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
Quote:
Originally Posted by subxero View Post
Sweet little bike, is it premix only or is there some kind of oil injection system?
They originally have oil injection, but the previous owner disabled it and converted to premix. Generally a lot safer for the engine, as it's much more consistent and anytime it's running it has adequate oil.

It looks like the original owner (from NY) bought the carb and pipe almost immediately. Unfortunately there were a few rough edges and details that never got worked out in order to get it to run right.

Not sure why the jetting was so far off, but it was a real pain to ride in traffic the way it was. Now that the midrange mixture is right it has no problem in traffic.
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