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Title: Jetting for 250
Post by: vntg136 on November 05, 2002, 10:04:15 PM

I have a '77 250 just converted to a reed setup. Could someone suggest jet sizes to get me started, or suggest how much to go up on each jet from stock?
Thanks very much,
Bob

Title: Jetting for 250
Post by: john durrill on November 07, 2002, 01:31:25 PM

Bob . this is from the summer issue of Still Keeping Track.
Kent Knudson supplied info on a 250 with reed that they use in competion so they should be close for your bike
carb stock 36 mm Bing
160 main jet
283 needle jet
#1 ( 281) needle clip in the middle position
35 pilot jet.
hope thsi is a help.
John & Peter

Title: Jetting for 250
Post by: vntg136 on November 07, 2002, 02:53:10 PM

John,
Thanks very much. You've saved me considerable trial and error.
Bob

Title: Jetting for 250
Post by: imported_n/a on November 07, 2002, 03:05:52 PM

Bob, where did you get the G.E.M. reed? I'm thinking about adding one to a cylinder, but have no clue where to source one.

Glenn

Title: Jetting for 250
Post by: vntg136 on November 09, 2002, 12:27:47 PM

Quotequote:
Bob, where did you get the G.E.M. reed? I'm thinking about adding one to a cylinder, but have no clue where to source one.

Glenn

Title: Jetting for 250
Post by: vntg136 on November 09, 2002, 12:31:07 PM

Oops - ignore that thing above.

I'm not going to be much help locating a reed block - mine was already on a spare motor that I bought. Seemed like a good idea to use it, since the porting was already done and I like the one on my CZ.
Bob

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General Discussion => Penton Talk => Topic started by: vntg136 on November 05, 2002, 10:04:15 PM