92 gsxr pre katana compatibility

[davedude44]

I have tried to educate myself to the best of my ability by searching through threads here and elsewhere. Still dont have as much info as i would like so posting up to see what you guys have to say.

I currently have a 96 kat 600 full yosh setup and fp stage 1 kit. Realistically I would like to upgrade to a new bike altogether however my insurance company has failed to find out about a pretty big ticket so cant have a new bike because i would have to set up a new policy. This being said I am looking to upgrade my kat.

I have found a pretty good deal on a 92 gsxr 750. Perfect candidate for a motor donation to the kat. I have read its a fairly straight through process with the possibility of having to grind away part of the kats tank support to fit the motor in. My buddy has an atv jack that ill use to raise and lower motors. One question about the swap is the hydraulic clutch setup. Worth it to swap it to the kat or should i use my 600's cable system. Curious what is involved in both of these. I also plan on using the 750 oil cooler and headers (proper cooling) (fitament issues with header?) The bike has an aftermarket system but i really like the sound of my exhaust so may see if both of the exhausts will be able to mount up to the 750 headers to see what i like best. Along with the motor itself. Last motor bit is the CDI. I have the understanding that the gsxr cdi must be swapped over to start the bike.(electronically at least) I know this stands for the ingition but really dont have much other information on it. what is it where is it how would u go about swapping it why swap it etc. I dont need a book but im pretty serious about this swap so viable information is definatly a plus.

Then there is the rest of the bike. I guess a big question is would it be worth it to buy the whole bike or should i just buy the parts i need from him. Im thinking just buy the bike as ripping it apart for what i need would be a pia and the bike is cheap as it is. I can always resell what i dont use off it to make some money back.

With that being said i have been looking at what all can be used off of the gsxr on the kat that would provide an advantage over the current kat setup. I believe that the forks are a direct swap over less possibly having to grind off studs thats are for the steering radius? pros to the gsxr forks being more adjustable? with the gsxr forks id also have the whole front end basically to use if i wanted wheel fender and brake setup. any advantages to using these over the kats/ should i take time to do it? An issue thats come up is the weight difference between the kat and gsxr and possibly having to swap to different springs or higher weight oil? really dont want to have to mess with that thoughts on that would be great as well.

Then there is the back end of the bike. With what ive read about changing the gearing with the motor swap my thoughts are why not just use the gsxr rear wheel. I like the wider look much better anyways. Now obviously it wont fit into my stock swing arm with modifying it. I am not looking to heavily fabricated anything on the bike. Mainly just bolt ons. However swapping the gsxr swing arm over would allow the back wheel to be used. also would extend the bike.(not so sure pros or cons to this) From what ive read i guess the swing arm is not a bolt on replacement and requires the use of spacers to fit properly? if spacers is all thats needed i wouldnt mind swapping it over if i can find the spacers needed before hand. With that id now use the gsxr rear brake setup(kat and gsxr have different setups that go with respective swing arm?) and have the nice rear wheel and sprocket. Now I would have to swap over the gsxr chain as well to compensate for the longer swing arm. There is also the gsxr rear shock not sure pros or cons to swapping it out some thoughts on that would be nice.

Those are the big things im looking at. If theres anything else that i could mix and match what is it and what are reasons for doing so? Any problems seen with my thoughts or anything im missing would be great. I want to educate myself the best i can before taking on a task such as this. Will be checking out and probably bringing home the gsxr in next couple weeks and at the very least will swap the motor over.

Thanks in advance
Dave

[Kreylyn]

Definately purchase the whole bike if it's cheap. Resell of left over parts helps to offset the costs. Your taking the bike apart to swap over parts anyways, so it's not really extra work so much.

I would use the GSXR front end and wheel.

I would suggest looking at modifying the katana swingarm and using the GSXR parts between the Kat swingarm forks (caliper bracket, rotor, wheel, sprocket carrier, spacers, axle.

If you use the GSXR swingarm, I'm pretty sure that one is more A shapped so it widens faster than the Kat arm... not clearing the subframe. You would need to do some major modificaiton of the subframe then.

Or... Cut the subframe off and use the GSXR tail and swingarm together. You do have a whole donor bike.

Krey

[GSXFJim]

I agree with Krey, swap the front end.. its direct.. the steering stops will need to be changed, the gsxr stops wont let the rack turn far enough. I had that issue with my swap.

[TheCheetorProject]

I also agree with krey u have a donor bike get to modding her and post pics when done.

[Wild-Bill]

One frankenbike, coming right up!

Take the whole bike. The parts you don't need will probably cover a pretty good chunk of your purchase price.

Go with the hydraulic clutch. Just think, no more worn out, frayed or gummed up cables, no more cable adjustment and you get a lighter feeling clutch lever out of the deal, too. In this case, all you have to do is flush the fluid and mount everything in your frame. Then flush out the line when you're doing your brakes every spring.

[scottynoface]

I'd rather maintain and change a cable to get the feel of a cable clutch, the hydros have always felt a bit numb to me. The pull is much easier though, so I guess its just a matter of preference.

[mreedohio]

if you go hydro clutch you will need to modify the shifter/cover so your able to shift with your foot on the peg

[Wild-Bill]

When I did the hydro conversion to my 750 I used the sprocket cover from an early 90's GSXR-1100. The footpeg and shifter were in exactly the same position as the 750 Kat cover.

[mreedohio]

nice, good to know that bill

thinking about it a little more, wouldn't he still need to modify the the shifter since the 600 peg setup is a little different then the 750?

[davedude44]

Okay so it looks like getting the whole bike is a definate. Will plan on swapping over the entire front end. GSXFJim what was involved with with changing the steering stops? What comes to mind for me is grinding the old ones off and welding on new studs. Even just tacking a nut on. Any downside to not taking the time to put new ones on?

Krey, if i were to modify the katana swing arm in lieu of using the gsxr one would it be best to obtain a 750 swing arm and modify that or use my 600? Im thinking the 750 would be better to use because based on what ive seen from you and others modifying swing arm the over all length gets shortened. If this were to be done are there any specifications to modifying the swing arm? Would like to do it right the first time. Ive read through your pictorial thread on your modification and seems you use the same wheel. Perhaps some info if you know it on the spacers and axle. I would like to re use as many parts as i can and avoid modiying things and having parts machined if possible. I also saw your new brake arm not sure what will need to be done there with swapping over rotor and caliper from the gsxr.


Im thinking going with the hydraulic clutch. Then i wont have to mess with swapping the cable system off my 600 motor. To accommodate for the shifter position could i just swap out the foot pegs from the gsxr assuming they are longer? or find a longer peg to replace the katana one.

Also looking for some information on swapping over the cdi and if there are any pros of using the gsxr rear shock.(and involvement for changing that out).

Talked to the guy with the bike and he still has it and i dont see it going anywhere so hopefullly at the end of this month ill be able to pick it up and begin my project.

Thanks for all the help

[ratfighterkat]

deff. go for the gsxr front end and if your looking for a fater tire look you could just get a post 98 kat wheel and swap it in and youll only have to mod the brake arm and hanger i did this and was able to run a 170 with no issues the first pic is the 170 the 2nd is the stock brake arm the 3rd is the new brake arm and the last is the stock 150 tire

[davedude44]

Well unfortunately 3 weeks away from purchase bike sold.. Guess I will have to look for a new donor bike

[mreedohio]

yea wondered how that bike didnt sell quicker, was it the one i think on cleveland cl?

[davedude44]

yea wondered how that bike didnt sell quicker, was it the one i think on cleveland cl?

Haha yeah it was. If timing was better with school i would have picked it up sooner.

[loudnlow7484]

Haha yeah it was. If timing was better with school i would have picked it up sooner.

IIRC, the one on Cleveland CL didn't have USD forks. No USD forks = not a 92, or not the correct forks. I didn't look at it really closely, but I recall looking at the ad and noticing the forks.