5mm cylinder spacer

[moabnut]

Hello there glen
Im looking for a 5mm cylinder spacer. I want to run a late model crank, rod and cylinder on my 86 cases. Does anyone make one or is this custom?

Thanks Sam

[fastkart]

Last I knew, cometic made them, but you'll also have to have the cases bored to fit the large O.D. of the cylinder sleeve, and longer studs in the cases.

[dannygraves]

I ran the cometic kit on my gen-1. I don't remember the part numbers, but you could give them a call.

[100hp honda]

does cometic use aluminum or what ?

[dannygraves]

yup
they sell a kit w/ 1 AL spacer and 2 thin (high comp.) base gaskets.

[nmdesertrider]

just the way to spoil a good motor

[moabnut]

I ran the cometic kit on my gen-1. I don't remember the part numbers, but you could give them a call.

Thanks you, did you have any issues with the kit? remember the cost?
Cheers

[dannygraves]

no issues w/ the kit. I didn't like the thin hicomp base gaskets since they are thin without the metal shim, so I used a very thin coat of yamabond on the bottom, used some shims and ticghtened it down and cleaned up the excess, then used a standard cometic metal shim base gasket to make it easier to pull the jug later.
It wasnt very pricey, I want to say like $30-$40 or somehting like that.

[dannygraves]

dug up an old e-mail from them:
This is what you will need for a 5mm spacer kit:

1 - B0016188A $28.25 each
2 - B0016012F $6.30 each (12.60)


Kevyn Kistner
Technical Sales
Cometic Gasket


#2 is the thin hi comp gasket, your call if you want to run 2 of them or do like I did.

[glen howell]

MOABNUT, I have some spacers.I would need to know in sae what size ?When I got these years ago from COPPER GASKETS they came in SAE sizes. You do know there is quite a bit of moding to the bottom end to ues the later top end.PM me Glen

[moabnut]

How much grinding is required to the cases? It looks pretty close. Is trimming the skirt off the cylinder a no no?

[100hp honda]

if you plan to use .020 gasket on top and bottom of the plate youll need about a .177" thick. thats assuming you want to keep port/deck heights the same as before.

[glen howell]

Heres a set of older cases being machined to take later cylinder. Glen

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[moabnut]

Is the machined area where I see the red marker? were those cases sandblasted?

Thanks for all the info glen