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Author Topic: Gear box sprocket for a 59 Chief  (Read 795 times)

ERC

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Re: Gear box sprocket for a 59 Chief
« Reply #15 on: January 25, 2014, 01:24:26 PM »
Sand is right to bad it's to cold in the shop, I could have looked and not made such a stupid statement.  ERC
2-57 Apaches, 2-57 Trailblazers, 60 Chief, 65 Interceptor, 2004 Bullet, 612 Bullet chopped.

High On Octane

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Re: Gear box sprocket for a 59 Chief
« Reply #16 on: January 25, 2014, 01:55:41 PM »
Ummmmmmmm.......    ???

I'm not sure who you talked to but ALL the gear box sprockets are the same.  Compare the pic you just posted to the pic they have posted on the link I posted previously.  They're identical.  You will want to order either a 21 tooth or a 22 tooth as the 16" Chief wheel make the gearing extra short.

Scottie


ERC - Look at MY stupid ass statement.    :-X

In all seriousness, I just searched for a good half hour and there is NOTHING available for this particular sprocket.


I asked a shop with high tech equipment for an estimate to make one and they said $350. Each additional one was like $40.

I'll pull the sprocket off of my tranny and take it to a couple different machine shops this week and see if I can find a cheaper price.  My sprocket is worn pretty bad, but it's still intact.  There are probably a hundred different machine shops in the Denver metro, I'll talk to my Brit bike parts suppliers and see who those 2 recommend.  This is a bummer.  Just when I thought I was going to save a few bucks on my Bonneville build, now I have to have a custom sprocket made.   It never ends.  LOL  We should look into a group buy tho, it would save everyone some money.  And once the sprocket is tooled, future sprockets will be much cheaper the 2nd go round.

Scottie
« Last Edit: January 25, 2014, 02:03:38 PM by Scottie J »
Bulldog Kustoms - Denver
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rotorwrench

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Re: Gear box sprocket for a 59 Chief
« Reply #17 on: January 25, 2014, 02:52:05 PM »
The AM gearbox was purchased for use in the manufacture of the 1959 models on but only the Chief and Apache were produced by that time frame. I've never owned a Chief to scope out in detail the final drive arrangement. A wider tire/wheel combo likey required spacing the final drive chain out just a bit more to clear the fat tire. I'll have to check my Apache & Chief parts list and see if they used the same front sprocket on the final drives. The Apache did have a ball ramp clutch so it may have had the same set up. I have a 59 Apache trany somewhere in my stuff but I'm pretty sure I don't have any Chief  stuff.

Scottie J, you might consider a change to an H type gearbox if you are using a narrower tire/combo like the Constellation and Interceptor used. It may not be quite as strong as the AM series gearbox but they were strong enough and can be converted back to the pushrod clutch of the later Interceptor models. The ball ramp clutch was not the best idea that Royal Enfield came up with. The H series are much easier to get parts for.
« Last Edit: January 25, 2014, 03:03:20 PM by rotorwrench »

High On Octane

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Re: Gear box sprocket for a 59 Chief
« Reply #18 on: January 25, 2014, 04:35:16 PM »

Scottie J, you might consider a change to an H type gearbox if you are using a narrower tire/combo like the Constellation and Interceptor used. It may not be quite as strong as the AM series gearbox but they were strong enough and can be converted back to the pushrod clutch of the later Interceptor models. The ball ramp clutch was not the best idea that Royal Enfield came up with. The H series are much easier to get parts for.

Well, with all the problems I have with the Albion on The Blackhawk, and taking into consideration that I'm trying to lay down 100hp+ at the rear wheel, I really need the extra beefiness the AM gearbox provides.  I just assume have a custom sprocket made, even if it means dropping $350.

Scottie
Bulldog Kustoms - Denver
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RE_Chief

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Re: Gear box sprocket for a 59 Chief
« Reply #19 on: January 25, 2014, 10:58:02 PM »
I would be keen to buy a rear sprocket too.  If a group build goes ahead would whoever organises it be able send one to Australia, I pay all costs of course.

Regards Charles
1955 Indian Tomahawk 500 twin
1960 Indian Chief 700 twin
1964 Interceptor Mk1 750 twin
1967 Interceptor Mk1A 750 twin
1994 Bullet Deluxe 570 long stroke single

High On Octane

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Re: Gear box sprocket for a 59 Chief
« Reply #20 on: January 25, 2014, 11:29:29 PM »
I would be keen to buy a rear sprocket too.  If a group build goes ahead would whoever organises it be able send one to Australia, I pay all costs of course.

Regards Charles


I don't see that being a problem.   :)
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gunnerasch

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Re: Gear box sprocket for a 59 Chief
« Reply #21 on: February 02, 2014, 10:20:42 AM »
When looking for a gear maker...use the search terms "gear hobber", or Gear cutter. Not a lot of CNC shops can properly cut gears and then know enough about having them heat treated properly.

Gunner, machinist and machine tool repair

High On Octane

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Re: Gear box sprocket for a 59 Chief
« Reply #22 on: February 02, 2014, 12:32:05 PM »
When looking for a gear maker...use the search terms "gear hobber", or Gear cutter. Not a lot of CNC shops can properly cut gears and then know enough about having them heat treated properly.

Gunner, machinist and machine tool repair


Are you offering your services?  ???  ;)  Because well, damn it!  Someone needs to be making these damn sprockets!
Bulldog Kustoms - Denver
Specializing In Kustom Paint

The Blackhawk
1958 Enfield/Indian 711cc Twin

Building The 1st Ever Ace Performance Twin

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RE_Chief

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Re: Gear box sprocket for a 59 Chief
« Reply #23 on: April 11, 2014, 09:50:28 PM »
Rather than getting a new sprocket made, would it be possible to replace the main sleeve with one that is made to take the H49 sprocket?  You would then have a choice of 20T, 21T, or 22T sprockets.

Regards Charles
1955 Indian Tomahawk 500 twin
1960 Indian Chief 700 twin
1964 Interceptor Mk1 750 twin
1967 Interceptor Mk1A 750 twin
1994 Bullet Deluxe 570 long stroke single