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Author Topic: CR500 IN A CB FRAME?  (Read 1741 times)

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Offline IBleedHondaRed

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CR500 IN A CB FRAME?
« on: October 23, 2013, 09:09:43 AM »
Anyone attempted this? ive dreamed about putting the cr500 two stroke engine in a cb500 frame. looks like there is room and the weight saved would be substantial. seems like an easy way to hit 60 hp
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OEM DIAGRAMS http://www.shopstarcitypowersports.com/OEMpartfinder.htm

1971 CB500K0
1973 CB350F (x2)
1973 CB350G
1973 CB500K2
1977 CB550F2
1989 Hawk GT 647 (Adventure)
1989 Hawk GT 696 (Barely street legal track bike)
2007 XT225
2008 650 Gladius
2012 CB1000R
2012 VT750 Phantom   SER #000105
2013 F6B Goldwing      SER #000082
2013 KTM 300 XC-W
2014 CTX 700             SER #000043

Offline IBleedHondaRed

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Re: CR500 IN A CB FRAME?
« Reply #1 on: October 23, 2013, 12:10:57 PM »
i have cb500 frame. guess i should look for a wrecked cr500 for engine, harness and parts
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OEM DIAGRAMS http://www.shopstarcitypowersports.com/OEMpartfinder.htm

1971 CB500K0
1973 CB350F (x2)
1973 CB350G
1973 CB500K2
1977 CB550F2
1989 Hawk GT 647 (Adventure)
1989 Hawk GT 696 (Barely street legal track bike)
2007 XT225
2008 650 Gladius
2012 CB1000R
2012 VT750 Phantom   SER #000105
2013 F6B Goldwing      SER #000082
2013 KTM 300 XC-W
2014 CTX 700             SER #000043

Offline Bankerdanny

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Re: CR500 IN A CB FRAME?
« Reply #2 on: October 23, 2013, 12:39:45 PM »
Go for it. Just about anything can be done with time effort and cash.
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Current: '76 CB750F. Previous:  '75 CB550F, 2007 Yamaha Vino 125 Scooter, '75 Harley FXE Superglide, '77 GL1000, '77 CB550k, '68 Suzuki K10 80, '68 Yamaha YR2, '69 BMW R69S, '71 Honda SL175, '02 Royal Enfield Bullet 500, '89 Yamaha FJ1200

Offline Retro Rocket

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Re: CR500 IN A CB FRAME?
« Reply #3 on: October 23, 2013, 01:15:15 PM »
You would be better off finding something lighter if power to weight is what you are chasing, mid 80's RG, KR or TZR chassis would be much better... ;) We had a guy in AUS in the 80"s {Chris Oldfield i think his name was} who raced a big 2 stroke dirt bike in A grade racing and won a lot, he actually used the motocross frame with lowered suspension and used to ride around the outside of everyone, great to watch.... ;D
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Offline IBleedHondaRed

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Re: CR500 IN A CB FRAME?
« Reply #4 on: October 23, 2013, 01:39:09 PM »
yeah but then it wouldnt be a cool looking old cafe or a honda
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OEM DIAGRAMS http://www.shopstarcitypowersports.com/OEMpartfinder.htm

1971 CB500K0
1973 CB350F (x2)
1973 CB350G
1973 CB500K2
1977 CB550F2
1989 Hawk GT 647 (Adventure)
1989 Hawk GT 696 (Barely street legal track bike)
2007 XT225
2008 650 Gladius
2012 CB1000R
2012 VT750 Phantom   SER #000105
2013 F6B Goldwing      SER #000082
2013 KTM 300 XC-W
2014 CTX 700             SER #000043

Offline Retro Rocket

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Re: CR500 IN A CB FRAME?
« Reply #5 on: October 23, 2013, 04:25:16 PM »
Quote from: IBleedHondaRed on October 23, 2013, 01:39:09 PM
yeah but then it wouldnt be a cool looking old cafe or a honda

It doesn't take much imagination to make it look like a cafe, any bike can wear that look....
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750 K2 1000cc
750 F1 970cc
750 Bitsa 900cc
If You can't fix it with a hammer, You've got an electrical problem.

Offline IBleedHondaRed

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Re: CR500 IN A CB FRAME?
« Reply #6 on: October 24, 2013, 06:38:34 AM »
well ive started digging. ill keep yall posted
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OEM DIAGRAMS http://www.shopstarcitypowersports.com/OEMpartfinder.htm

1971 CB500K0
1973 CB350F (x2)
1973 CB350G
1973 CB500K2
1977 CB550F2
1989 Hawk GT 647 (Adventure)
1989 Hawk GT 696 (Barely street legal track bike)
2007 XT225
2008 650 Gladius
2012 CB1000R
2012 VT750 Phantom   SER #000105
2013 F6B Goldwing      SER #000082
2013 KTM 300 XC-W
2014 CTX 700             SER #000043

Offline ohiocaferacer

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Re: CR500 IN A CB FRAME?
« Reply #7 on: October 24, 2013, 09:09:05 AM »
I had a guy from Seattle stop by a few years ago(maybe 2006) that had put an older air cooled Yamaha WR500(2 stroke) motor into a CB350 chassis. Bike had all alloy body work and he said it was so fast it was scary. He said he rode it all over the Seattle area. I had a pic, but cant find it. Maybe someone in the Seattle area has seen it?? It was easy to identify, as the exhaust pipe was stock.....but flipped upside down and ran under the engine.

I asked him why he didnt use a CR500 motor?? He said he chose the Yamaha, because it had a lighting coil with electrics and he didnt want to deal with getting the CR500 motor setup to run lights. The bike looked amazing with big air cooled 2 stroke motor. Wish I could find the pic........ >:(

Keep us posted......i've been wanting to do something like this for along time.
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Offline IBleedHondaRed

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Re: CR500 IN A CB FRAME?
« Reply #8 on: October 24, 2013, 09:54:05 AM »
I have some sources for electronics I can get. found an older wrecked cr500 supermoto a couple months ago I shoulda snagged. was set up for headlight and everything. woulda been a perfect donor. I wouldn't care about signals on a bike like that anyways. seems like the 500 or 550 chassis is optimal. the frame for the twin has the central support that I fear would interfere with the carbs
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OEM DIAGRAMS http://www.shopstarcitypowersports.com/OEMpartfinder.htm

1971 CB500K0
1973 CB350F (x2)
1973 CB350G
1973 CB500K2
1977 CB550F2
1989 Hawk GT 647 (Adventure)
1989 Hawk GT 696 (Barely street legal track bike)
2007 XT225
2008 650 Gladius
2012 CB1000R
2012 VT750 Phantom   SER #000105
2013 F6B Goldwing      SER #000082
2013 KTM 300 XC-W
2014 CTX 700             SER #000043

Offline kghost

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Re: CR500 IN A CB FRAME?
« Reply #9 on: October 24, 2013, 02:16:47 PM »
Its been done a few times on the KR
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