My R75/5 sputters at 75 MPH

cliff chaplin · 2018-05-29T05:29:01Z

I ride a 72 R75/5. It rides smooth as can be. Since I own it, three summers now, on the highway just at 75 MPH is starts to sputters. Almost as if it has a governor on it. I don't believe it happens in the lower gears, even as I rev it to 5,500 RPM. The only time I feel it is at the highest end of fourth gear. The pattern is a cycling of power giving a feeling of being starved of fuel but I don't think that is it, cause it is only in fourth. I thought it may have been a timing issue but I have already replaced the points with electronic ignition. The engine has additional power but somewhere there is a bottleneck in regard to power. Does anyone have any thoughts on this? I always feel one of you veterans have usually traveled passed these issues somewhere in the past. Thanks for looking in on this, Cliff

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Tobin Peever

(@tpeever)

Posts: 40

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I'm no chemical engineer either. All I can relate is my own experience. I have about 14 years of experience with vintage bikes and cars and have religiously kept ethanol-free supreme fuel in all the tanks with Stabil and have had ZERO fuel issues. Generally try to change it out in every vehicle once per year. Knock on wood. I think Stabil is cheap insurance.

Posted : 08/19/2018 00:23

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