Author Topic: 90+ exhaust pipe cooling ring  (Read 929 times)

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Offline veikko1

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90+ exhaust pipe cooling ring
« on: 21 Jan 2022 at 20:15 »
Hello There

I am thinking, if some member can loan 90+ exhaust pipe cooling ring to me, that I can get cast new to my bike??

Regards
veikko1

Offline eddie

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Re: 90+ exhaust pipe cooling ring
« Reply #1 on: 22 Jan 2022 at 06:50 »
Hi Veikko,
                The early 'Plus' series machines had the finned exhaust cooling rings, but it was found that the disturbed air flow over the heads actually caused the engine to run hotter. The later plain rings permitted smoother air flow and improved the heat dissipation.

   Hope this helps,
                            Regards,
                                         Eddie.
« Last Edit: 24 Jan 2022 at 20:56 by eddie »

Offline douglas1947

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Re: 90+ exhaust pipe cooling ring
« Reply #2 on: 24 Jan 2022 at 05:23 »
Hi Veikko,

do you have no exaust pipe rings (plain or finned)?
I think the very early X 90 /80+ models have had also only plain rings. I can measure a plain exaust ring if you want. May be it is easier to reproduce.

Michael

Offline veikko1

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Re: 90+ exhaust pipe cooling ring
« Reply #3 on: 24 Jan 2022 at 19:09 »
Thanks your answers Eddie and Michael. I have engine number X90/50, and "story tells" that bike have been with finned rings when it come to Finland, new, but now them are missing. Yes, I have same means, that plain type are easier made, and cooling are better, (finned only looks better). So it would be fine, if you can take some measures, Michael.

Regards Veikko

Offline douglas1947

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Re: 90+ exhaust pipe cooling ring
« Reply #4 on: 25 Jan 2022 at 05:23 »
Veikko,

I will measure the nut and will also send some photos to you.
(My 90+ has engine X90/16 and was delivered with plain ex nuts.)

Michael

Offline douglas1947

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Re: 90+ exhaust pipe cooling ring
« Reply #5 on: 26 Jan 2022 at 04:56 »
Hi Veikko,

photos and measures are ready to send to you.
Here is one for the forum.

Michael