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Author Topic: Gt650R Race Mods  (Read 2746 times)

stigger

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Re: Gt650R Race Mods
« Reply #10 on: November 06, 2015, 03:04:49 AM »

The 07 will likely have the grenade engine, better check for that first.
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CHC Racing

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Re: Gt650R Race Mods
« Reply #11 on: November 09, 2015, 05:12:04 PM »

Fork sizes are as follows:

Upper ClAMP (OPEN): 51.11mm
Lower Clamp Diameter (Open): 54.06

Upper Clamp (Closed/ Tightened): 50.04mm
Lower Clamp (Closed/tightened) : 53.3mm

Fork size: (Upper) : 50.9mm
Fork Size ( Lower) : 53.3mm

Length wouldn't make much difference (assuming they are not to short) as they could be passed through the clamps and then tightened if they are too long. If we used a matching front wheel, brakes etc... then surely it would work without the need to machine axles etc...???
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Cloud

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Re: Gt650R Race Mods
« Reply #12 on: December 14, 2015, 11:26:41 PM »


So RC8 forks will go in GTR triples, along with RC8 wheel and brakes?
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The_Phil

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Re: Gt650R Race Mods
« Reply #13 on: December 19, 2015, 10:00:32 AM »

Hi guys i can confirm 100% that the RC8 forks, wheel and brakes will fit straight in.
Just need to figure out how to get the speedo to work.
The RC8 has a small sensor bolted to the inside of the left fork as a pickup for the speedo.
If you have an aftermarket speedo then it should be possible to mount a pickup somewhere there.

Plenty of room with the forks although the higher wheel and guard seem to be pretty close to the bottom of the headlight/nose cone not sure if it would be an issue but i couldnt take it for a test ride before i had to put the RC8 back together.
The RC8 Forks also seem a touch shorter but i dont think thats going to be a problem.

Ill upload a couple of photos later.
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The_Phil

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Re: Gt650R Race Mods
« Reply #14 on: December 20, 2015, 05:36:35 AM »


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Cloud

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Re: Gt650R Race Mods
« Reply #15 on: December 20, 2015, 10:43:45 AM »


I owe you a beer, possibly a brewery, for this discovery.

Yet I'm still gonna ask for more. Did you weigh the components, and find out what the mass variances are, sprung and unsprung?
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The_Phil

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Re: Gt650R Race Mods
« Reply #16 on: December 20, 2015, 11:24:21 AM »

I dont have an electronic scale in the workshop however the marcehsini forged rim is less than half the weight of the hyo one.
The front guard also about half the weight.
forks weigh about the same.
axle is lighter by about half.
calipers weigh the same.

Im going to try some triumph street triple/daytona rims during the xmas break and see what comes out of that.
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umop-ǝpisdn

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Re: Gt650R Race Mods
« Reply #17 on: December 20, 2015, 09:49:49 PM »

Just need to figure out how to get the speedo to work.

Phil:

Excellent work here. Stunning result!

With regard to the speedo, have you tried using the stock pick-up into the Hyo dash?

All speedos work on the same basic principle. A waveform oscillating at different frequencies to indicate present speed. If the waveform doesn't match what the stock Hyo dash is expecting, a speedohealer will correct it. Just mount a GPS to show actual speed and convert the percentage correction between actual speed (GPS) and displayed speed (Speedo reading). With a waveform, it will always be a linear relationship between what the Hyo expects and what the RC8 sensor is giving.
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The_Phil

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Re: Gt650R Race Mods
« Reply #18 on: December 21, 2015, 01:05:47 AM »

I dont have a spare pickup and i cant cut the one off the RC8 because it is a bike that is for sale so i cant do any permanent mods using it.
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CHC Racing

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Re: Gt650R Race Mods
« Reply #19 on: March 30, 2016, 05:18:57 PM »

Thats awesome Phil!

Any issues with brake caliber alignment or anything like that?
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