Project My ZXR(s)

Picked up 3 ZXRs today. The green one is at 38k km, the middle at ~100k, and the one on the right at 48k km. I will test the oil pressure and compression of them all tomorrow and see what needs doing.

The plan here is to do them up, sell one of them as road legal which should pay for everything. I will try to keep the green one for myself, after I do it up, and maybe keep the last one as a track bike.

Seeing as the 'nice' 38k bike's rego has lapsed, I will need to transfer the plate from one of the other bikes. But due to the no ABS no re-rego laws in NZ, either I need to swap frames, or swap frame vin numbers. Which would be easiest? Do they even check them?

 

Yeah, It's brand new. I got a real bargain for them so I couldn't turn them down. The black tyga kit is really good, too. The tank cover is inside my ute, it was just on there loose. Both kits are complete!

 

Hi everyone, thanks for all the good wishes.

Grey, the overflow bottle is just ziptied onto the radiator . Someone removed some fins and ran the zip tie through there.

ZXRNZ, thanks mate. Will be in touch if there's anything I need.

I got the green bike ('95) running tonight. Replaced the reg/reg wiring and plug as it was a bit munted. Still only 10V coming out at 5k rpm, even with working battery fitted. Will measure stator resistances tomorrow.

Also, it feels like the clutch might be slipping a little when shifting at high rpm, but I'm not entirely sure. Will have to confirm.

Lastly, the doesn't rev past 16k. Is this a CDI restriction? I will put the '92 CDI on the bike tomorrow and see if it makes a difference.

Cheers everyone!

 

Ordered new clutch friction plates from impex japan + some "heavy duty" springs.

Still having trouble getting it to rev past 16k. I put a '92 CDI on. Does anyone have some insight into the meaning of cdi numbers?

Started tearing the other bike (black) apart last night. Got it running, but on 3 cylinders. Carbs looked clean and have brand new litetek seals installed. Will put another set on today and see if any different.

 

Wow, interesting. I thought they would the same as the hondas, with late model mc22(R) being the restricted ones. That's what I get for assuming.

So then, is the 16k limit only there to limit the bike to 40HP, or is it there to stop the bike blowing itself to bits, considering different stroke. I had a chinese TCI on my mc22 which had the option of disabling the limiter. It seemed to work well enough. Bad idea?

Yeah, thanks for the pointers re carbs. I checked the boots and all the vacuum bits and the seemed pretty good. I have a spare set of working carbs anyway so it can't hurt to pop those on. My ultrasonic cleaner should (hopefully) turn up next. No more dirty carbs . I will get around to ordering some litetek kits for the green bike and spare carb set.

Re the clutch- yip hahaha. Had to redo (took clutch off parts bike) because I was in a rush and didn't read everything in the manual. Will take it for a quick hoon to confirm no more slippage when it stops pouring down.

 

Yes, I do, thank you!

Update re limiter: 10k ohm resistor spliced between pink TCI wire and frame fixed the issue. Revs to 19k now. Thanks for the pointers, Linkin.

 

Morning all

Got the black zxr running, but not nicely. Sounds as if it's on 3 cylinders for the most part, then for a second or two it runs on 4. Choke makes no difference.


I had the carbs in the ultrasonic cleaner for 30 mins, jets too. New seals all throughout. Im 99.9% sure the carbs aren't the issue as I've put a different set of carbs on the bike, but made no difference.

I plugged up the vacuum barbs on the carb boots. The original lines had some tiny cracks. As far as I can tell, there are no leaks through the carb boots, but I'll swap the ones from the parts bike onto this one and see if it's any different.

Confirmed a fat blue spark across all 4 plugs/leads. Plugs are in good nick.

I attempted to do a compression test, but it seems no matter how hard I try, I can't get the hose to thread into the spark plug hole.

The engine only has 45k km, so I'm thinking maybe valve clearances? Or am I jumping the gun?

It's hardly scientific, but I *think* cylinder #2 has the misfire. I splashed some water on the exhaust pipes after letting it idle for a couple minutes, and #2 seems to be cooler than the rest.


'Green ZXR' happily sitting in the garage now, all working. I'll put the new clutch/heavy duty springs in once they turn up. Should be a couple weeks. Not bad for $1300 and a bit of TLC!


Looks like the weather might allow for a ride later today! I've only taken it up and down the road thus far

Cheers everyone!

 

Stock spec
Intake: 0.15 ~ 0.24mm
Exhaust: 0.20 ~ 0.29mm

in#1: 0.14mm
in#2: 0.18mm
ex#1: 0.23mm
ex#2: 0.20mm

in#3: 0.15mm
in#4: 0.15mm
ex#3: 0.15mm
ex#4: 0.20mm

in#5: 0.13mm
in#6: 0.18mm
ex#5: 0.13mm
ex#6: 0.18mm

in#7: 0.13mm
in#8: 0.15mm
ex#7: 0.18mm
ex#8: 0.20mm

Valves are pretty dang tight.