Dennis I would love some more info on your cam but as I am currently packing my computer for a move and will be off line for some time, I will raise that again when I am back on line. The Corish cam that I have has a valve timing of 23 55 64 14 measured at .050 lift. The cam has an overlap of 37 deg...

The VH in standard tune is slightly overgeared. In my experience fitting a 22 tooth engine sprocket to a standard engine will result in an increase in top speed to about 90mph or just over. The 22 tooth sprocket also improves low speed flexibility. With a highly tuned VH the 22 tooth sprocket helps ...

Gary
If the bolts are 5/16" as initially stated then a torque figure of 12 -15 foot pounds would be more appropriate.
David

The Corish Ariel and the Corish Vincent (also in a featherbed frame) were very well known bikes often ridden by Eric Debenham. (but the photo of the person in race leathers is not Debo) In fact Debo would run the 1000cc Vincent in the historic class then upgrade it, brakes etc, to compete in the ope...

Thankyou for the kind wishes. All bikes and parts already moved. Removalist arrives on Thursday, so I am very busy packing and cleaning. I have filled a 3m2 rubbish skip, and been burning a lot of paper and timber for a couple of days.
David

Well guys I am going to disappear from the forum for a while. I have exchanged contracts for the sale of my house and will be moving in 2 weeks time. Moving was not something that I wanted however I have been forced out by a crooked developer and corrupt local councillors. My current home was my dre...

Keith I would try some running in oil and if the cylinder has glazed get a hone run through it again. If you can get the rings sealing well you will eliminate most problems. With regard to the breather, the crankcase breather is the most efficient, however there is always more oil loss from the cran...

Studs pulling in alloy is not just a problem with the 4, as many engines can suffer the same problems. The longer the stud the more likely the stud will pull. The reason being the alloy expands more than the stud, so when the engine gets hot the torque on the stud increases and it pulls the thread i...

Keith said
I have a 3½ cutaway and can source a 150 jet and will give it a try.
probably a typo but the main jet starting point is a 250
David

Keith An engine only needs one breather. With straight breathers, all that the extra breather does is suck more air into the engine and increase crankcase pressure and oil leaks. With one way reed valve breathers that problem is eliminated however there is still only the need for one breather. As Al...