Search found 5 matches

by 18ss
Sun Mar 22, 2020 2:20 pm
Forum: Twinshock & Classic Trials
Topic: Extra home workshop time
Replies: 36
Views: 8019

Re: Extra home workshop time

There is all ways soaking it with citric acid in the manner you have chosen. If there is the slightest bit of unseen rust under the paint work full immersion in a bath will find it and therefore lift the paint, plus it is quicker than molasses and doesn't have the same scent. Despite having used mol...
by 18ss
Fri Nov 29, 2019 12:08 pm
Forum: Technical help
Topic: Non destructive testing and engine part measuring
Replies: 1
Views: 1973

Re: Non destructive testing and engine part measuring

Any engine re builder can check for bent rods and crank and crack test same. I always get a crack test on an engine rebuild. The only time I've had cases tested they torqued them together and measured for bearing housing out of roundness with a inside micrometer. It was out of round so it was line b...
by 18ss
Sat Nov 17, 2018 7:40 pm
Forum: Twinshock & Classic Trials
Topic: Cota 172 Restoration
Replies: 107
Views: 100349

Re: Cota 172 Restoration

Not that I can find. A 10g spoke should be 40 tpi. If the thread gauge says 32 tpi a unc 32tpi no.6 may do. As you stated there is no metric equivalent that would work. I would probably try, if the threads were too rough a 32tpi thread file or if they are just crudded a touch of fine valve grinding ...
by 18ss
Thu Nov 15, 2018 2:07 pm
Forum: Twinshock & Classic Trials
Topic: Cota 172 Restoration
Replies: 107
Views: 100349

Re: Cota 172 Restoration

3.2 mm equates to 10g spokes which were fairly standard on the front wheels of british bikes. Anything pre-69 will use them.
by 18ss
Fri Nov 20, 2015 12:06 pm
Forum: Technical help
Topic: Well this sucks
Replies: 6
Views: 28769

Re: Well this sucks

In the vehicles I have worked on it has always been course thread into the alloy. It appears to be due to the depth of thread contact ie difference between major and minor dia. of the thread pattern and the tapping limitations of the older alloys. Finer threads just seem to weld themselves solid. If...

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