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Author Topic: The worlds fastest Weslake.....well maybe!  (Read 67971 times)

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Offline Briz

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The worlds fastest Weslake.....well maybe!
« on: September 22, 2010, 03:41:23 PM »
Following on from the earlier thread as to what class I could run in:
http://www.landracing.com/forum/index.php/topic,8632.0.html
This will deal with the buildup of the bike. Not a lot of progress yet, still figuring things out.
I pulled a few covers off the engine to get some idea of whats what:



All looks pretty robust; camchains are chunkier than you'll find in most jap engines. Seems to be 6-hole adjustment for cam timing. Oilpump looks like it could be a modified Norton one.

Spline on sprocket shaft is very beefy 1.5" major diameter. Way bigger than an HD. Wish I knew if there was anything which fits that spline!


Looks like torquing the heads down is going to be fun!-


Heres a shot of the engine/trans interface. You can see that mating the early FXR case will be a simple job.


Thinking I'll run EFI for fuelling. looking at Suzuki TL1000 parts; throttle bodies etc, although they're way bigger than the manifold inlet - 36mm. The TL has 52mm TBs. Some work to do there although I'm concerned about messing with those super rare head castings.

As for the bike itself, I'm torn between a simple solid-mount rigid and a swingarm rubbermount setup. If I (or you) cant think of any good reason not to, I'll go with the latter. The FXR platform is a good one.

Offline Nortonist 592

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Re: The worlds fastest Weslake.....well maybe!
« Reply #1 on: September 22, 2010, 03:54:20 PM »
Nice!   I can see a few bits that are common to Weslakes.  They are beefy but need careful setup.  I love the head torquing idea!!!  Haven't seen that before.  I notice on the wall behind the engine there are a couple of big hammers.  You may be tempted but don't.  Youre going to love the big beastie.  Keep us up to date.
Get off the stove Grandad.  You're too old to be riding the range.

Offline saltwheels262

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Re: The worlds fastest Weslake.....well maybe!
« Reply #2 on: September 22, 2010, 05:35:37 PM »
briz,

nice looking engine.

the earliest the trans could be is a '99, off of a twin cam.
(as far as getting parts for it.)

good luck with your build.

franey
bub '07 - 140.293 a/pg   120" crate street mill  
bub '10 - 158.100  sweetooth gear
lta  7/11 -163.389  7/17/11; 3 run avg.-162.450
ohio -    - 185.076 w/#684      
lta 8/14  - 169.xxx. w/sw2           
'16 -- 0 runs ; 0 events -- made a 2 state change in ZIP codes

" it's not as easy as it looks. "
                            - franey  8/2007

Offline Stan Back

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Re: The worlds fastest Weslake.....well maybe!
« Reply #3 on: September 22, 2010, 05:59:43 PM »
Re: The worlds fastest Weslake.....well maybe!

How about . . .
Re: The world's fastest Weslake.....not yet!

Stan

Member of the San Berdoo Roadsters -- "California's Most-Exclusive Roadster Club".
Celebrating 67th anniversary of racing on the salt.

Offline willieworld

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Re: The worlds fastest Weslake.....well maybe!
« Reply #4 on: September 22, 2010, 06:24:48 PM »
the trans case is an early 80s FXR ------ my guess is 82                                        willie buchta
willie-dpombatmir-buchta

Offline Briz

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Re: The worlds fastest Weslake.....well maybe!
« Reply #5 on: September 22, 2010, 06:35:13 PM »
Re: The worlds fastest Weslake.....well maybe!

How about . . .
Re: The world's fastest Weslake.....not yet!
Stan

I Wasn't making any serious claim there Stan! Could turn out 'Not the worlds fastest Weslake by a long way'  :-D

the trans case is an early 80s FXR ------ my guess is 82                                        willie buchta

Its an '85 - the first year of the big bearing. Which was a bit of luck. Did some welding mods on it today to accept a late starter & add beef around the swingarm pivot/rear mounting. An '86 case would have been ideal.

Offline Nortonist 592

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Re: The worlds fastest Weslake.....well maybe!
« Reply #6 on: September 22, 2010, 07:02:59 PM »
Re: The worlds fastest Weslake.....well maybe!

How about . . .
Re: The world's fastest Weslake.....not yet!

Stan



Hey Stan.  It could be the worlds fastest Weslake.  Remember its a twin and the firing order has to be right.
Get off the stove Grandad.  You're too old to be riding the range.

Offline Stan Back

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Re: The worlds fastest Weslake.....well maybe!
« Reply #7 on: September 22, 2010, 07:04:29 PM »
2-1 won't work?
Member of the San Berdoo Roadsters -- "California's Most-Exclusive Roadster Club".
Celebrating 67th anniversary of racing on the salt.

Offline Nortonist 592

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Re: The worlds fastest Weslake.....well maybe!
« Reply #8 on: September 22, 2010, 07:36:00 PM »
2-1 won't work?

Just because I crossed the plug wire on my single doesn't mean you should make fun of me.



Sorry Briz.  We're just passing time eagerly awaiting the next installment.
Get off the stove Grandad.  You're too old to be riding the range.

Offline saltwheels262

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Re: The worlds fastest Weslake.....well maybe!
« Reply #9 on: September 23, 2010, 05:13:19 PM »
the trans case is an early 80s FXR ------ my guess is 82                                        willie buchta

didn't know evo trans' had a bolt pattern on
front of case.

what does it bolt to?

franey
bub '07 - 140.293 a/pg   120" crate street mill  
bub '10 - 158.100  sweetooth gear
lta  7/11 -163.389  7/17/11; 3 run avg.-162.450
ohio -    - 185.076 w/#684      
lta 8/14  - 169.xxx. w/sw2           
'16 -- 0 runs ; 0 events -- made a 2 state change in ZIP codes

" it's not as easy as it looks. "
                            - franey  8/2007

Offline Briz

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Re: The worlds fastest Weslake.....well maybe!
« Reply #10 on: September 23, 2010, 05:40:56 PM »
Up until '86 they had a removable plate on the front with a horizontal part extending forward with 2 holes which bolt up to the rear of the motor. From '87 on they integrated it into the main casting. Its not clear why they made it a seperate piece in the first place, but for a fat tire FXR it does make offsetting a lot easier.
Of those with removable plates, only the '86 bolts up to belt drive primaries without modification.
The '99 up twincam cases could be made to work with the Weslake, but the bolt flange is much larger and I think the assembled drivetrain would be a couple of inches longer.

Here you go: 3 generations of FXR / FLT front mounts:
« Last Edit: September 24, 2010, 05:31:42 PM by Briz »

Offline Dreamweaver

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Re: The worlds fastest Weslake.....well maybe!
« Reply #11 on: September 23, 2010, 05:53:19 PM »
So what/who is the world's fastest Weslake?  :cheers:

Offline Nortonist 592

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Re: The worlds fastest Weslake.....well maybe!
« Reply #12 on: September 23, 2010, 08:06:42 PM »
Cammy or pushrod or just plain fastest/
Get off the stove Grandad.  You're too old to be riding the range.

Offline k.h.

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Re: The worlds fastest Weslake.....well maybe!
« Reply #13 on: September 23, 2010, 09:30:56 PM »
128 hp on methanol, 120 on gas.  The "other" V-twin.
In theory, there is no difference between theory and practice.  But in practice, there is.--Jan L. A. Van de Snepscheut

Offline Briz

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Re: The worlds fastest Weslake.....well maybe!
« Reply #14 on: September 24, 2010, 05:35:48 PM »
Mostly the work at present is measuring stuff. To run an HD belt drive I have to get the engine & trans the exact right distance apart. Heres how I measured crank centre to rear flange:


Finished modifying the tranny case; widened & reinforced the swingarm pivot too, and enlarged the spindle hole to 11/16"

« Last Edit: September 24, 2010, 05:37:32 PM by Briz »