What to do about stripped tach drive gear 300-450

960 · Mar 16, 2010

What is being done about the no longer furnished tach drive gear for the 300-450? Seems like 80% I see are stripped. I have found a few random NOS but kind of pricey. Yea supply and demand.

mkirsch · Mar 17, 2010

You got three choices:

1. Pay the NOS price.
2. Find a good used one at a junkyard.
3. Leave it broken.

Wardner · Mar 17, 2010

(quoted from post at 18:00:41 03/17/10) You got three choices:

1. Pay the NOS price.
2. Find a good used one at a junkyard.
3. Leave it broken.

4. Make one.

I know that sounds bizarre. About 40 years ago, I replaced the speedpmeter drive gear in a military 45" Harley-Davidson. The original was made of phenolic and I reproduced it in brass at the local Voke School night class. They had a small Hardinge miller with the proper gear cutting tooling. It was nothing special; a set of indexing heads and a cutter with the right pressure angle. I learned alot about gears.

If you don't have the time or inclination, talk to the daytime head of the machine shop. He might assign a daytime student to make the part.

Janicholson · Mar 17, 2010

Go to a transmission shop and match up the gear pitch and diameter (there are so many, one is likely to be identical (or very close) modify the shaft interface or length to suit. Been there and did not ask what it came from. the task only took 5 minutes in a drawer full of used plastic gears. jim

randy hall · Mar 17, 2010

i just got a new one from our ih dealer last month. they ordered it and it came the next day. new ih part. not aftermarket or new old stock. sounds like your dealer doesn't want to help you very badly.

What to do about stripped tach drive gear 300-450

960

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mkirsch

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Wardner

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Janicholson

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randy hall

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