So I've got a head that came to me with some weak threads (appears to have been cross threaded once).
Threads still work, but I'd prefer to take care of it right while its off the bike.
I took it to a machine shop to put a helicoil in, but he didn't have 12mm spark plug helicoils and also said that he wouldn't put a helicoil in it as they may work their way out.
In any case, is there a more correct way to repair spark plug threads than helicoils?
Spark plug thread repair
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Spark plug thread repair
1954 Harley ST165 basket in the attic
1972 Suzuki GT750 project in the works
1981 Honda CB750-1000 driver
1982 Honda GL500 easy project
1972 Suzuki GT750 project in the works
1981 Honda CB750-1000 driver
1982 Honda GL500 easy project
- advant63
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arne,
i have a thread insert in my hand that is a solid cylinder with a 16 m outer dia.
i called my supplier (who' s out of stock) to get more info.
he says it's made by helicoil and called save a thread or fix a thread.
my digital camera has flat batteries so i can't send a picture. if you want one i can post it later.
it is black metal with some knurling at one end, and fits ngk b series plug threads perfectly.
i have a thread insert in my hand that is a solid cylinder with a 16 m outer dia.
i called my supplier (who' s out of stock) to get more info.
he says it's made by helicoil and called save a thread or fix a thread.
my digital camera has flat batteries so i can't send a picture. if you want one i can post it later.
it is black metal with some knurling at one end, and fits ngk b series plug threads perfectly.
m12 or50 k10 a100
s32-2 s32-2 t250r
gt250 t500r gt550a
twin cobras in baskets
s32-2 s32-2 t250r
gt250 t500r gt550a
twin cobras in baskets
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Cool, thanks.advant63 wrote:arne,
i have a thread insert in my hand that is a solid cylinder with a 16 m outer dia.
i called my supplier (who' s out of stock) to get more info.
he says it's made by helicoil and called save a thread or fix a thread.
my digital camera has flat batteries so i can't send a picture. if you want one i can post it later.
it is black metal with some knurling at one end, and fits ngk b series plug threads perfectly.
I need one for a honda 12 dia x 1.25mm pitch plug...
After a bit of reading I like these time sert things, but they're a bit spendy
http://www.timesert.com/
1954 Harley ST165 basket in the attic
1972 Suzuki GT750 project in the works
1981 Honda CB750-1000 driver
1982 Honda GL500 easy project
1972 Suzuki GT750 project in the works
1981 Honda CB750-1000 driver
1982 Honda GL500 easy project
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- AMA Superbike
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Timeserts are expensive, but they are great!! I had a GT750 engine's exhaust bolt holes redone with them. It's worth the cost. Contact an automotive machine shop. The cost for them to do it, could be cheaper than buying the Timesert and the four tools required.
Lane
Lane
If you stroke it more than twice; you're playing with it.
Too many bikes, too much time, ENOUGH SPACE, FINALLY! Never enough money.........
Too many bikes, too much time, ENOUGH SPACE, FINALLY! Never enough money.........
- advant63
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- H2RICK
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I vote with rngdng on this one. We use Timeserts in our shop and NO comebacks. Those suckers will NEVER come out like Helicoils will. Well worth the bucks, IMO.
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H2A Semi-Hot Rod Built From A Basket Case
KZ650C2 Mint & Original...mostly
GSF1200SK6 Bandit...My LD Ride
Additional H2 projects In Boxes.....
MBD Sufferer