Problems with left crank arm

sam1492

Hi I have a 2007 Kona Scrap and have recently been doing bigger jumps than usual but found that my left crank arm keeps coming loose any advice would be good

nicklouse

replace it.
you will have damaged the splines and it will keep coming lose.

sam1492

Thanks

sam1492

Hi I checked the crank arm and it's the pinch bolt and crank bolt that is coming loose should i still replace the crank arm?

nicklouse

what are the cranks?

sam1492

FSA Gravity Moto-X MegaExo

Turrican

Hello, well the crank arm should fit on spline properly/fully and all the bolts that hold it on need to be tightened using a torque wrench as they need to be tightend to a certain amount, dont know how tight for your cranks without looking on web, also would be hard to advise about getting new ones with out seeing them, so your best bet is to go to your local good bike shop and ask them to have a quick look, shouldnt cost anything for quick look if you have good friendly bike shop they can advise you if its damaged like the spline or your BB or any bolts etc. You can also use some thing called lock tight (i think thas what called) like a glue, you put it on the bolts and keeps it tight, you can still get bolts off if need to but stops them coming undone, any way thats also why you have to tighten bolts to certain tightness hope helps

sam1492

Thanks for all the help appreciate it