88 XR630 Jetting??

1 reply to this topic
  • Gigerchild

Posted December 07, 2005 - 01:21 AM


What would be a jetting for 88 XR630 with white bros e series pipe

Its got 155 main 62 pilot 4th clip? sound rite?

Also what would cause idle to stay high after small rev?

Help appreciated!

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  • creeky

Posted December 07, 2005 - 07:17 AM


My '98 XR 628 with a Yoshimura pipe required a 162 main and a 65 slow jet. The high intake manifold vacuum generated by the 600 engine tends to hold the throttle slide against the slide bore and causes it to stick slightly and the slide will not immediately return to idle position, especially if the slide is somewhat worn and a little sloppy in the bore.

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