Author Topic: need help with invader 440 clutching  (Read 878 times)

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gixxer6

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Re: need help with invader 440 clutching
« Reply #15 on: February 26, 2017, 04:33:31 PM »
I don't know the exact weight.  Start with the stock bolt with three thick washers on each and adjust until it will pull 7900 to 8000 max rpm. 

These sleds didn't bog when new.  Get it running 100% correct in stock from before modifying.  Otherwise it's just a bandaid that will mask the true issue and it will never perform as well as it could.  That being said, these old high performance piston port 440s are definitely lacking low end power and if you want to race it, this clutch setup makes a huge difference. 

Kal k

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Re: need help with invader 440 clutching
« Reply #16 on: February 27, 2017, 01:48:37 PM »
Ya putting it to sock now to get it figered. Jetted the mains down to 135 because I thought it was to fat but now I'm thinking it's not getting enough fuel through them in bottom end because once the econo jets kick in it pulls hard

gixxer6

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Re: need help with invader 440 clutching
« Reply #17 on: February 27, 2017, 02:21:07 PM »
Do you have the original airbox installed?

Kal k

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Re: need help with invader 440 clutching
« Reply #18 on: February 27, 2017, 07:53:53 PM »
Ya but has some cracks in places