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Workshop => Engine and Bottom End => Topic started by: Black Sheep on April 05, 2015, 10:14:25 PM

Title: Question about Sphynx, Puma, Saber-tooth and other big bore cylinders
Post by: Black Sheep on April 05, 2015, 10:14:25 PM

Sphynx, Puma, Saber-tooth and other big-bore or powervalve cylinders.

Do any of these, or any other big bore cylinders not fit in the ATC 250R frame?

Title: Question about Sphinx, Puma, Saber-tooth and other big bore cylinders
Post by: Hawaiiysr on April 05, 2015, 11:43:04 PM

Yes sir!

Title: Question about Sphinx, Puma, Saber-tooth and other big bore cylinders
Post by: Black Sheep on April 06, 2015, 12:14:15 AM

uhm...ok what ones don't fit

Title: Question about Sphinx, Puma, Saber-tooth and other big bore cylinders
Post by: rk88r on April 06, 2015, 07:43:13 AM

I think spark plug clearance is the issue.

Title: Question about Sphinx, Puma, Saber-tooth and other big bore cylinders
Post by: Pumashine on April 06, 2015, 09:41:41 AM

No problem with the Puma

Title: Question about Sphinx, Puma, Saber-tooth and other big bore cylinders
Post by: JesseA420 on April 06, 2015, 09:48:15 AM

spark plugs will always be close to frame, but squeezing huge intake tracts between that small area between the upper shock mount and the frame rail is going to be an issue id think.

dave moores new chassis addresses both these issues. i would contact him.

Title: Question about Sphinx, Puma, Saber-tooth and other big bore cylinders
Post by: Black Sheep on April 06, 2015, 10:00:31 AM

I'm building my own frames for big bore 250R/500R engines. Intake clearance won't be an issue. Just curious to what problems the big bore 250R cylinders have with stock frames