SF1 Top End Rebuild - and nearly skint

[mikeringrose]

Hello,

I found the source of my rattle being the cam flange but one thing led to another and now I have a large pile of parts on my work bench. Although I wish to do the job right and do it once, I am a bit skint (massive tax bill looms large) and do not wish to replace parts that are serviceable given my anticipated low annual mileage.

Today I removed the valves. Comparing the minimum stem width in the Green book to my valve stems there appears to be a bit of wear. The worst one is 7.93 and the best one is 7.98. The Book says they should be no less than 8mm. Also the spring lengths are also shorter than the book says. The inners are about 42mm and outters 45mm. They should be 46.7mm

Do you think the above parts are scrap or are they servicable? The bike does not burn oil. Also, Can I be sure replacement new items will measure up to the required minimum sizes?

Regards
Mike

 

[Grant]

Mike, you don't want to be going back inside the engine at all soon.
My advice would be to try to save pennies elsewhere, not inside the engine.
Change the drive chain, tyres, paint etc later.
They are accessible easily enough.

 

[mikeringrose]

Yes sorry 47.6mm free value spring length. I transposed the 6 and 7.

Bloody annoying when you buy a bike having been told by the selling dealer and the previous owner that it was fully rebuilt when that is simply not the case.

Regards
Mike

 

[Grant]

Well, it was rebuilt, just using all the old bits.
Caveat emptor.
Always ask for supporting receipts for work claimed to be done.