drunkn munky Posted June 14, 2013 Report Share Posted June 14, 2013 One of the spark plug threads on my FZR 4 has been cross threaded, the plug goes in fine where about half way down it comes to a stop. I have the head off and had a good look inside with some light and the thread doesnt look that bad, even the thread at the top looks ok its just half way down it looks messed up. Now before i take it to a machine shop to sort would re-tapping the thread from the bottom up work seeing theres a good 10-15mm of good thread at the bottom will the tap recut the top half ok? Link to comment Share on other sites More sharing options...
bikemike Posted June 14, 2013 Report Share Posted June 14, 2013 As you already have the head off I would just take it to the shop and have the job done properly, that way you know it is done. It doesn't cost that much. Re-tapping it might work, but if it doesn't you've then got to strip the engine down again. Have you got a tap the right size? Taps that size ain't cheap.. Link to comment Share on other sites More sharing options...
BudgetBoy Posted June 14, 2013 Report Share Posted June 14, 2013 Heli coil kit or machine shop Mike beat me to it... Link to comment Share on other sites More sharing options...
porter_jamie Posted June 14, 2013 Report Share Posted June 14, 2013 i have a 14mm spark plug helicoil kit Link to comment Share on other sites More sharing options...
dansp1 Posted June 14, 2013 Report Share Posted June 14, 2013 A plug thread chaser is what you need, have a look on the bay Link to comment Share on other sites More sharing options...
drunkn munky Posted June 14, 2013 Author Report Share Posted June 14, 2013 A plug thread chaser is what you need, have a look on the bay Machine mart sell these too, as there cheap i'll give one of those a go tomorrow. If that fails then............. i have a 14mm spark plug helicoil kit Jamie, would you be able to do it one evening next week if i popped it over? Link to comment Share on other sites More sharing options...
porter_jamie Posted June 14, 2013 Report Share Posted June 14, 2013 Ivan can do it next week probably because i am off doing the LDD, and he is on holiday atm. Send hime a PM or call him next week J Link to comment Share on other sites More sharing options...
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