There is already a thread on this subject. You might start by looking at that.

Sorry for the long wait, but I finally realized no repair was required on the bike in my care. But I did happen to find this helpful article. See this...

After reading Mike Hammer's 1995 article on the starter relay on IBMWR it all became clear to me how the corrosion started, and why this issue may be ...

Any Idea where to get that replacement gasket? ► It's not a "gasket", but rather a metal shim that fits onto the cylinder base WITH the gasket. Sev...

That's a very ambitious undertaking. I'm very impressed. Keep us posted.

Sorry that It took me so long to let you know that my bike is Fixed. It was the rubber grommet between the carbs and cylinder head. It was cracked cau...

Mr Cullen - Sincerely not trying to insult your intelligence, but did want to start where you were comfortable and hopefully move you to a place wher...

Here's a way for a novice to think of it.... The explosion resulting from the burning of fuel is what drives the piston down, thus turning the cran...

Are you talking about the handlebar Hi/Lo switch ?? The R75 I worked on had the funny spherical head lamp beam and turn signal switches. I can help a...

I had, for a while, solved the preignition but it came back the moment I took my girlfriend for a ride to show off my fixin' skills. It mainly only ha...

I have left the safety and dry of north GA to ride my R100 deep into northern TN to allow the hurricane to rain on me for 3 days. My bike is holding ...

I had, for a while, solved the preignition but it came back the moment I took my girlfriend for a ride to show off my fixin' skills. It mainly only ha...

The Wikipedia explanation under the Heat Range section explains it much better.... Not to worry. I worked as a professional motorcycle mechanic f...

If it were my bike, I would try a cooler plug next. For example, I normally run NGK, BP6ES spark plugs. BP7ES would be one range cooler for an Airhead...

I would not advise any major engine changes until you sort out your present issues. Your issues are most likely NOT tied to being 600cc displacement. ...