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Late H1 Ignition Pickup Needed - Part number 21152-004 - "N"
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Author:  Jim [ Tue Feb 11, 2025 5:24 pm ]
Post subject:  Late H1 Ignition Pickup Needed - Part number 21152-004 - "N"

I'm working on Jim Gaal's late H1 ignition system and found one of the pickups open-circuited. Does anyone here have one to sell?

Part number 21152-004
"N" is molded into the plastic housing.

Author:  nitrouscarl [ Wed Feb 12, 2025 11:26 pm ]
Post subject:  Re: Late H1 Ignition Pickup Needed - Part number 21152-004 -

Jim wrote:
I'm working on Jim Gaal's late H1 ignition system and found one of the pickups open-circuited. Does anyone here have one to sell?

Part number 21152-004
"N" is molded into the plastic housing.

I will check Jim.

Author:  Jim [ Thu Feb 13, 2025 8:02 am ]
Post subject:  Re: Late H1 Ignition Pickup Needed - Part number 21152-004 -

Thanks Carl

Author:  nitrouscarl [ Sun Feb 16, 2025 8:57 pm ]
Post subject:  Re: Late H1 Ignition Pickup Needed - Part number 21152-004 -

Jim, Charles found a pickup are they both the same? Interchangeable?

Author:  Jim [ Sun Feb 16, 2025 9:33 pm ]
Post subject:  Re: Late H1 Ignition Pickup Needed - Part number 21152-004 -

They're different. One is marked "N" and one is marked "S".

Author:  ALTERED IMAGE [ Mon Feb 17, 2025 9:15 am ]
Post subject:  Re: Late H1 Ignition Pickup Needed - Part number 21152-004 -

Wire it backward if needed.

As you know, stock is...
1 S
1 N

tied in parallel for current boost

I believe???

cliff

Author:  Jim [ Mon Feb 17, 2025 2:20 pm ]
Post subject:  Re: Late H1 Ignition Pickup Needed - Part number 21152-004 -

ALTERED IMAGE wrote:
Wire it backward if needed.

As you know, stock is...
1 S
1 N

tied in parallel for current boost

I believe???

cliff

Reverse-wound reverse-polarity is usually done to reject noise. In this case, probably interference from the other nearby coils.

H2 ignition timing, with three identical pickups, is affected by the charging coils. I've seen significant timing changes by messing with the charge current. I have little doubt that the RWRP pickups of late H1s are that way for good reason.

Author:  nitrouscarl [ Mon Feb 17, 2025 9:49 pm ]
Post subject:  Re: Late H1 Ignition Pickup Needed - Part number 21152-004 -

Sorry Jim, it appears that it is not the correct one...

Author:  Jim [ Tue Feb 18, 2025 7:59 am ]
Post subject:  Re: Late H1 Ignition Pickup Needed - Part number 21152-004 -

That's OK Carl, thanks to you and Charles for trying. There are some on eBay now, and one is a NOS at a non-stupid price.

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