SOHC.co.uk Forums > CB350/400

Horseshoe Cam Tensioner bolts - not happy with the threads question.

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Bryanj:
Timesert but i dont think there is enough metal around the bolt hole to fit those, they are tapped out to 10mm

AshimotoK0:

--- Quote from: Macabethiele (Ted) on June 08, 2021, 08:33:27 AM ---
--- Quote from: Bryanj on June 07, 2021, 05:45:12 PM ---Depends on fuel cost but you can brig it to me in Glos and i will do it for you

--- End quote ---

Thanks for the offer but you are a tad too distant - I will go to the engineers who did my tensioner screw insert and have it helicoiled. I have read on here somewhere of another brand / type of insert but can't bring the name to mind.

--- End quote ---

After all of the issues you have had Ted ... a trip to Bryan's would be beneficial for other reasons as he could cast an eye over you parts and give you his opinion & do your threads. Just a thought.

McCabe-Thiele (Ted):

--- Quote from: Bryanj on June 08, 2021, 08:50:29 AM ---Timesert but i dont think there is enough metal around the bolt hole to fit those, they are tapped out to 10mm

--- End quote ---

In that case I will stick with a couple of Helicoils - tbh my experience of Helicoils was way back in the late 1960's when they used to be poorly thought they would sometimes come out with the bolt! Like most things the technology has improved and they are dependent also on the fitter.

 

McCabe-Thiele (Ted):
After a pretty long wait (17 days but who's counting) I collected my upper crankcase today - despite engineers being careful there were clearly fine bits of alluminium turnings in the casing groan.........

So removed the bits I had left in place - gear selector forks, slector shaft & gear selection tumbler to re-clean the casing. 
Thank goodness I had removed both gear clusters safely stored in oiled zip lock bags.

Probably as it took so long I was given a pair of new set bolts as the threads were badly worn on the originals.

Only thing I have left in place is the starter gear that I have thoroughly cleaned with petrol, dried then squirted with WD40, dried again, cleaned the crank oil ways (again) and cleaned out all the thread holes with cotton buds after jetting with WD40.

I plan to have a long weekend off with a view to rebuilding the crankcases next week unless..................

smoothoperator:
Well hopefully the helicoils are all good and you have a squeaky clean engine! It's all progress Ted.

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