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KHR flywheels

PostPosted: Fri Jun 03, 2016 3:26 am
by Simon
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!

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Re: KHR flywheels

PostPosted: Fri Jun 03, 2016 9:53 am
by thefrenchowl
Yes, Simon,

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

Patrick

Re: KHR flywheels

PostPosted: Tue Jun 11, 2019 3:25 pm
by depthsounder
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

Re: KHR flywheels

PostPosted: Wed Jun 12, 2019 1:20 am
by Simon
Are there stroker plates under the cylinders? The KHR would up the stroke to 4 9/16".

Re: KHR flywheels

PostPosted: Wed Jun 12, 2019 8:31 am
by depthsounder
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.
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received_615259855639361.jpeg (133.72 KiB) Viewed 14504 times

Re: KHR flywheels

PostPosted: Wed Jun 12, 2019 9:39 am
by 55panman
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.

Re: KHR flywheels

PostPosted: Wed Jun 12, 2019 4:20 pm
by Ferrous_Head
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.

Re: KHR flywheels

PostPosted: Wed Jun 12, 2019 6:59 pm
by 55panman
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.

Re: KHR flywheels

PostPosted: Wed Jun 12, 2019 7:38 pm
by Ferrous_Head
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.