ZXR 750 L model motor in Jmodel chassis - KawiForums - Kawasaki Motorcycle Forums
 
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post #1 of 9 (permalink) Old 12-02-2009, 04:48 AM Thread Starter
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ZXR 750 L model motor in Jmodel chassis

Good day all.
See newbie post for project story.
Thanks for prompt reply and advice on the non ram air situation using the J chassis. According to a thread on the zx forum pretty much most parts between 91-95 except body work and air box are compatable, can anybody verify that, before I go ahead and purchase the L motor. Only to find out tappet cover toutches, J model ignition map incorrect, J model carburators don't go in etc..... I am equiped and capable of sorting out most problems but lack of spare parts in South Africa is a major problem if you need to get hold of say a L model CDI unit in a hurry or such like. Going to check out J chassis tonight so getting excited, and would like to be on the road for my xmass present to myself.
Any help or advice would be appriciated as I have been in the motorcycle business for 15 years and have plenty of advice to share, I am also getting into webpage and flash design if anybody needs help, see: Untitled. for my last site designed.
Cheers
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post #2 of 9 (permalink) Old 12-02-2009, 11:14 AM
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Quote:
Originally Posted by KevinB View Post
Good day all.
See newbie post for project story.
Thanks for prompt reply and advice on the non ram air situation using the J chassis. According to a thread on the zx forum pretty much most parts between 91-95 except body work and air box are compatable, can anybody verify that, before I go ahead and purchase the L motor. Only to find out tappet cover toutches, J model ignition map incorrect, J model carburators don't go in etc..... I am equiped and capable of sorting out most problems but lack of spare parts in South Africa is a major problem if you need to get hold of say a L model CDI unit in a hurry or such like. Going to check out J chassis tonight so getting excited, and would like to be on the road for my xmass present to myself.
Any help or advice would be appriciated as I have been in the motorcycle business for 15 years and have plenty of advice to share, I am also getting into webpage and flash design if anybody needs help, see: Untitled. for my last site designed.
Cheers
All 91-95 ZX7 engines will interchange into all 91-95 ZX7 chassis.Using a J frame, carbs and ignitor will be fine with an L motor.
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post #3 of 9 (permalink) Old 12-02-2009, 10:50 PM
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yep...will go right in....the 91/92 ignitor has a lower RPM limit so you'll be missing out of some top end. The cam's will draw more air too, so you may want to look at the carbs/jetting.
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post #4 of 9 (permalink) Old 12-03-2009, 09:06 AM Thread Starter
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J chassis L motor

To 2fat2fly and jbreit,
Many thanks bro's just the answer I wanted to hear. Will attatch photo's of build, any other go faster info would appreciated, ie what cams work best, etc.. mate of mine has just got 2004 zx10, would be nice to give him a little bit of a run for his money. Any body got a good set of M model flat slides to sell, anybody got a L model CDI to sell or part trade with some cash on a J model CDI, pay via Paypal have another mate with courier company.
Cheers again
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post #5 of 9 (permalink) Old 12-03-2009, 09:28 PM
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The L motor is a solid power plant...but to give a zx10 a run for his money you'd need a bottle or forced induction...and prayers. The superbikes of its era didn't make as much power as the zx10 does stock.

The L/M model ECU/CDI connector is different (a newer/nicer weatherproof type)....though the connections are basically the same layout.

Save your money on the carbs. IF you could find a set, they will go for $450+ and be all gummed up.

There were no good drop in cams for them either...all required new springs.

I bored mine out using stock zx9r pistons (94-97 vintage) to make a 794. You could make an 830 if you resleeved. That and some head work by the valve seats go a long way with that bike.

The best thing it could use....a diet. I took my "zx8" to the track in 1999 for a CCS race when my regular bike was blown up...I had 600's walking me...its just old tech. While I miss my old 91 and 94, and still get emotional when I see one for sale, I remind myself that its old tech....I would not recommend putting modification cash into one with the hopes of "keeping up".
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post #6 of 9 (permalink) Old 12-04-2009, 08:01 AM Thread Starter
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Keeping up

There is no way keeping up with 165 bhp, I recon you be right, just interested to see what has been done and results, carbs equate to silly money in Rands and would probably require more investment to get in tip top, bigger slugs makes the best sense, still costly in South Africa.
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post #7 of 9 (permalink) Old 12-11-2009, 09:41 AM
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Kawa 750 Zxr J Model

I recently crashed into a barrier on the N1 (that wasn't supposed to be there). Can someone direct me to 1. parts supplier and / or 2. reputable repair guy.

Needs: new fairing; right brake bracket and some minor cosmetic repairs.

Thanks a mil!
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post #8 of 9 (permalink) Old 12-12-2009, 01:39 AM
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Quote:
Originally Posted by kawazanga View Post
I recently crashed into a barrier on the N1 (that wasn't supposed to be there). Can someone direct me to 1. parts supplier and / or 2. reputable repair guy.

Needs: new fairing; right brake bracket and some minor cosmetic repairs.

Thanks a mil!
Are you after OEM plastics and parts? Bummer on the tip over
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post #9 of 9 (permalink) Old 12-15-2009, 02:37 PM
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yes I am. Thanks.
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