CB750 bobber with 2002 GSX-R1000 motor.. INSANE POWER

Building a 1974 CB750 bobber using a 2002 GSX-R1000 motor (approximately 140hp). This bike is water cooled with a radiator, also an oil cooler. Bike is Fuel injected. Hardtail frame with 4" of stretch. Please feel free to comment.

Category:

Autos & Vehicles

Tags:

• gsxr 1000
• bobber
• cb750 bobber
• fast bike
• building a bike

[iroc86er]

I don't have it running yet. I am further along but running into some exhaust issues. My port 1 and 4 are inline with the frame and very tight so i'm currently putting in some short radius elbows and making new sleeves for the exhaust. It's becoming a lot of work to get it around the frame but will work with what little I have. Also determining where my radiator is going. I bought a smaller one but still not sure if i like it. Other than that it's getting there little at a time.

[musiclovr2]

maybe you can use aluminum sheet to make a thin air box as long as the box has the air space the original does it will run great

if you use the other or dont want it ill take a motor off your hands

[iroc86er]

Probably going to need the tranny parts from the other motor but we'll see. Also I did think about using moto-x radiators a guy in the forums stated he had some issues on hot days idleing. Thanks for the feedback.

[cornypoopjohnson4]

good luck. take your time, think it all out, you'll make it work fine.

[iroc86er]

Thanks, i've got a lot of work ahead of me

[teamziehm1]

Nice bike man!

[jaimecidcampeador]

Nice job. I am looking into swapping in another motor into my 750 as well. Any tips?

[MrOlddude1957]

I think you need a bigger back tire and better brakes

[stevenwawrzonek]

Sick. 

[AshishJeep]

looks good man. Have you done more work to it???

I just got a kz650 frame and a cb750 motor. The frame is getting chopped/stretched at the shop now. Initially thought about putting a GSXR 750 motor, but to be honest...Didnt have the balls to do it. But you should upload a video if you have it running!

Thanks

[HeatherHell666]

whoa sounds great! wait....you didn't even start it up. man. that bike is a frankenstein shoot her up with some lighting bolts and go ride

[wanderer1031]

@musiclovr2 air filters are for pussies.

[fexterz11]

i really wanna see the turn out of this. please keep the videos posted!!

[BoGiggers]

I have some advice, re-lace the rear hub to a wider rim so you can put that power to the ground! It's a 40 spoke and so are a lot of the aftermarket harley rims. You can go with a 16 or an 18. Probably want the 18 so you can use some gooey sportbike rubber. Might want to run it a little low on air too. The stock drum is plenty adequate. A cheaper route is to use a 1998-2003 Honda Shadow ACE or Spirit wheel. It's a 52 spoke 15in. wheel with a 170mm tire stock. BADASS start! Good luck!