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  1. #1
    cheatin' piston popper addicted's Avatar
    Join Date
    Jul 2006
    north jersey

    westcoast pipe instructions

    anyone have a copy of the instructions for a westcoast pipe for a 650sx? primarily need water routing, but jetting info for this pipe on a non ported motor with a 44sbn would help too


  2. #2
    cigarlust's Avatar
    Join Date
    Apr 2008
    Funky town (Fort Worth TX)
    To save you the headache of going over to

    I'm going to be running a stock 650 X2 with a 44mm sbn, a/f intake, prok air filter

    Everything jetting spec I have seen posted falls within the following.

    Single motor 650 doesn't need a maxxed out sbn, run 2.0 for your needle and seat. For the spring you want the 80g one (I think it's silver). That'll put your pop off at right around 20-22psi (ideal).
    For jets
    Low I was recommended 115-120
    High I was recommended 150-160

    Harry at group K said he agreed with everything except the highs, he said bump it up to a 180. Sounds like that's the jet you should be running.

    I ordered the needle and seat, a 117.5 pilot and a 160, 170, and a 180 main... I'll end up somewhere good.
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