KHR flywheels

Racing K Models

KHR flywheels

Postby Simon » Fri Jun 03, 2016 3:26 am

Hi everyone,

Here are some shots of KHR flywheels to help with identification. Don't often see these come up - these are currently intended for my XLR, can't let Patrick have all the fun!

Image

Image
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Re: KHR flywheels

Postby thefrenchowl » Fri Jun 03, 2016 9:53 am

Yes, Simon,

I have KHR flywheels in the XLRTT... ; 0)

Patrick
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Re: KHR flywheels

Postby depthsounder » Tue Jun 11, 2019 3:25 pm

From what I can tell through the timing hole, I have these flywheels in my 45" flathead WL motor (1963 cases, 1947 WR cylinders). Every detail matches: the extra holes near the pin, the thickness of the rim, style of timing marks.

Is this physically possible and if so, what are the advantages / disadvantages of this configuration?

Regards,
David
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Re: KHR flywheels

Postby Simon » Wed Jun 12, 2019 1:20 am

Are there stroker plates under the cylinders? The KHR would up the stroke to 4 9/16".
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Re: KHR flywheels

Postby depthsounder » Wed Jun 12, 2019 8:31 am

There are no stroker plates. Does this summarily exclude the possibility of these being KHR flywheels? I have not and would like to avoid seeing the pistons, as the bike runs reasonably well. It takes quite a bit more enrichment than the baseline Linkert setup on the high speed adjustment, which may give an indication of increased displacement. I have an 0.063" jet on a 1-1/2" M61B and find I need more than 2 turns open on the high speed needle.

I can't find any pictures of other flywheels with the same distinguishing features: thin rim which expands into the counterweight portion without a step and the extra holes near the pin.

Attached is a picture of the WR flywheels, which are the one that are "supposed" to be in this engine. The obvious differences are the step in the rim at the counterweight area and the lack of extra holes near the pin.
received_615259855639361.jpeg
received_615259855639361.jpeg (133.72 KiB) Viewed 14477 times
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Re: KHR flywheels

Postby 55panman » Wed Jun 12, 2019 9:39 am

One old cheater trick is to use XR 1000 rods on the wheels. They were shorter and eliminated the need for stoker plates. I can't remember off hand what stroke they worked the best with, but I know back years ago there were a couple a vintage bikes running the Davenport race with stroker wheels and no stroker plates.
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Re: KHR flywheels

Postby Ferrous_Head » Wed Jun 12, 2019 4:20 pm

Stroker pistons are readily available for XL's now that does away with the need for stroker plates. By simply moving the pin location upwards in the piston they can handle the extra stroke. I have a set of Dytch cylinders that came with two rings stroker pistons that probably were custom made.
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Re: KHR flywheels

Postby 55panman » Wed Jun 12, 2019 6:59 pm

Yeah, but I'm talking about WR's and KR's running with S&S stroker cranks. They use XR 1000 rods cause they're shorter and they don't have to use plates and no one can see that they're cheating with big engines.
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Re: KHR flywheels

Postby Ferrous_Head » Wed Jun 12, 2019 7:38 pm

Without measuring it's impossible to tell my big bore stroker is a big bore stroker.
The cylinders LOOK stock. No plates, no welding on the cases. It's about 74CID.
It was built long before the XR1000. Stock length K rods.
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