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 Post subject: H2 front sprocket
PostPosted: Tue Jul 25, 2023 6:45 pm 
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Joined: Tue Sep 01, 2020 5:19 am
Posts: 140
Location: canton, ct
So, I have a dilemma with my H2B. I'm finally assembling my H2B after a couple of years of buying parts, rebuilding what I can and sending out things to be rebuilt. But when I was fitting a new front sprocket it has some play that just doesn't seem right. The sprocket is a JT sprocket, part number JT508-16. I bought this online and have seen this sprocket offered on other sites, listing it as fitting my bike. I went with the 16 tooth to try to get a little better fuel mileage, not so worried about the launch. I have another H2 motor and tried the sprocket on this output shaft too. Same problem. The old sprocket from the second motor fits a little loose too. Both new and old sprockets on both motors have some radial play.

Is this normal? Does torqueing down the sprocket overcome the play? I tried to post a video but it was too large.

Thanks,

Dave

PS, what is the torque spec for the sprocket retaining nut?


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 Post subject: Re: H2 front sprocket
PostPosted: Tue Jul 25, 2023 7:24 pm 
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Joined: Wed Jun 08, 2011 11:34 pm
Posts: 9840
Location: North Central NC
I have a 16 J-T sprocket on my H2 and I don't remember it feeling overly loose. But yes, when the big nut is torqued to the spec, I don't think the fit of the spline is very imporant.

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 Post subject: Re: H2 front sprocket
PostPosted: Tue Jul 25, 2023 7:44 pm 
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Joined: Tue Jun 07, 2011 6:36 am
Posts: 2694
Location: Dandridge, TN, USA
http://kawatriple.com/torque.html

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 Post subject: Re: H2 front sprocket
PostPosted: Wed Jul 26, 2023 1:14 am 

Joined: Tue Jul 24, 2012 6:06 pm
Posts: 1137
Location: Honolulu
I torque my front sprocket nut to 70-80 ft lbs.


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 Post subject: Re: H2 front sprocket
PostPosted: Mon Jul 31, 2023 5:26 pm 
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Joined: Tue Sep 01, 2020 5:19 am
Posts: 140
Location: canton, ct
Torques to 70, we'll keep an eye on it when it's back on the road.

Thanks,

Dave.


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