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  #1 (permalink)  
Old 12-06-2009, 04:11 PM
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1/4" jackshaft bolt?

I have done a search about this but I still haven't found a answer. What my problem is, I am going from a BDL open primary to a stock style enclosed primary and I have a Spyke 1.4 KW starter which uses the larger 1/4" bolt. My inner and outer primaries and my jackshaft are the proper one for my build but it uses the 10-32 bolt. Can I just drill the shaft for the bigger bolt or would that make the shaft to weak? Or is a different starter in my future?
Thanks Thistle
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  #2 (permalink)  
Old 12-06-2009, 08:19 PM
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Change the jackshaft and the ring gear. You can thank me later.
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  #3 (permalink)  
Old 12-06-2009, 09:01 PM
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WHAT HE SAID. get the whole bulletpruf jack shaft from scooters performance to save even more headaches, you can thank me later
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  #4 (permalink)  
Old 12-07-2009, 06:34 AM
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Thanks guys,
But because my inner and outer primary covers take the newer style jackshaft a 1/4" jackshaft will not fit the primary. I could be wrong . Can I just change the starter drive from 1/4" to the smaller 10-32 on the starter nose that I have already?
Thanks
Thistle
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  #5 (permalink)  
Old 12-07-2009, 06:47 AM
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1/4" is a bolt.
10-32 is a machine screw.

Anything smaller than 1/4" is a screw not a bolt.
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Old 12-07-2009, 06:54 AM
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Sorry Donald,
So what size is the bolt for the smaller jackshaft?
Thistle
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  #7 (permalink)  
Old 12-07-2009, 08:16 AM
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Maybe this is what your looking for...

http://cgi.ebay.com/ebaymotors/TWIN-...item27ad1de0b0

and its listed as 10/32
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  #8 (permalink)  
Old 12-07-2009, 09:20 AM
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Thanks hamchop, but I need to go the other way, old style starter to new style jackshaft.
Thistle
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Old 12-07-2009, 09:37 AM
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You cannot change the jack shaft the lager one wont fit the later primaries. The Ultima starters are setup to run either bolt and come with a special reduces threaded bolt to accomplish the crossover. I'm not sure if they will work with any starter or just theirs. The other option is to change the starter Bendix. That is the only difference in the two starter as the later ones have a smaller hole the bendix will interchange.
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Old 12-07-2009, 09:45 AM
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Quote:
Originally Posted by thistlethunder View Post
Thanks hamchop, but I need to go the other way, old style starter to new style jackshaft.
Thistle
Lets try this one. I read somewhere that starters are threaded for both sizes in the actual bolt hole. That is why some people sell the longer bolts to go past the larger threads and into the smaller threads. I heard or read something to that effect somewhere but , cant gurantee it.


http://cgi.ebay.com/ebaymotors/25mm-...Q5fAccessories
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  #11 (permalink)  
Old 12-07-2009, 09:55 AM
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Quote:
Originally Posted by hamchop View Post
Lets try this one. I read somewhere that starters are threaded for both sizes in the actual bolt hole. That is why some people sell the longer bolts to go past the larger threads and into the smaller threads. I heard or read something to that effect somewhere but , cant gurantee it.


http://cgi.ebay.com/ebaymotors/25mm-...Q5fAccessories
I think only the Ultima starter s are threaded with the dual pattern but I could be wrong
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  #12 (permalink)  
Old 12-07-2009, 10:00 AM
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Quote:
Originally Posted by pushrod243 View Post
I think only the Ultima starter s are threaded with the dual pattern but I could be wrong
Ooops. Pushrod beat me to it...
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  #13 (permalink)  
Old 12-07-2009, 01:20 PM
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Just got off the phone with the boys at Spyke and they are sending me out a new starter drive end ( 10/32 ) to replace the 1/4 " . No charge, now that's customer service. Thanks for everyone help.
Thistle
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Old 12-07-2009, 01:25 PM
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Quote:
Originally Posted by thistlethunder View Post
Just got off the phone with the boys at Spyke and they are sending me out a new starter drive end ( 10/32 ) to replace the 1/4 " . No charge, now that's customer service. Thanks for everyone help.
Thistle

Very cool of them
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  #15 (permalink)  
Old 12-07-2009, 01:48 PM
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Great to hear...
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