J1 Rebuild
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J1 Rebuild
I thought I better start a new thread now I'v introduced myself.
Don't expect a quik turnaround with this one as I'm swamped with work at the moment and also need to sell a few bikes to make room to start this one properly.
Lets start with a few before pics. Not very good but you get the idea. Looks OK from a distance
Don't expect a quik turnaround with this one as I'm swamped with work at the moment and also need to sell a few bikes to make room to start this one properly.
Lets start with a few before pics. Not very good but you get the idea. Looks OK from a distance
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Re: J1 Rebuild
Air intake hoses are perished
Nice But on the plus side the plastics look OK
Hammerite on everything.Nice But on the plus side the plastics look OK
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Last edited by Green1 on Mon Jul 22, 2019 11:23 pm, edited 1 time in total.
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Re: J1 Rebuild
On to the engine. It looks to have a G stamped on it.
Engine No: ZX400GE008136
Engine No: ZX400GE008136
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Re: J1 Rebuild
The front forks are in a bit of a sorry state
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- R P Corse
- CBT slow
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Re: J1 Rebuild
be good to see this sorted!
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Re: J1 Rebuild
Not had a chance to look at the bike yet. But I did glance at its front forks and can't see any adjusters. Bummer
I also noticed a switch hardwired to the fan. It worked briefly then just stopped. The small amount of history I do have shows its had the head gasket done. But weather it was on this engine or another who knows.
I also noticed a switch hardwired to the fan. It worked briefly then just stopped. The small amount of history I do have shows its had the head gasket done. But weather it was on this engine or another who knows.
- banner001
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Re: J1 Rebuild
The front forks only have the bottom compression dampers from the J2 onwards.
Can you get a better picture of this G or J punch mark on the RHS side of the engine, as I can't see it in your pictures...
Can you get a better picture of this G or J punch mark on the RHS side of the engine, as I can't see it in your pictures...
UK ZXR400 L3 (1993) - Fully restored and on the roads, my green beast!
JPN ZXR250 A2 (1990) - Revs to 19,200rpm... 'nuff said
JPN ZXR250 A2 (1990) - Revs to 19,200rpm... 'nuff said
- R P Corse
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Re: J1 Rebuild
Banner I was always under the impression the H/J1 had the compression on the base of the forks as well?
see.... I still learn something new everyday
see.... I still learn something new everyday
- banner001
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Re: J1 Rebuild
J2 was where they got a bit more serious with the SP
The J2 has flatslide carbs too. J1 is stock carbs, slotted cams, close ratio gearbox.
The J2 has flatslide carbs too. J1 is stock carbs, slotted cams, close ratio gearbox.
UK ZXR400 L3 (1993) - Fully restored and on the roads, my green beast!
JPN ZXR250 A2 (1990) - Revs to 19,200rpm... 'nuff said
JPN ZXR250 A2 (1990) - Revs to 19,200rpm... 'nuff said
- R P Corse
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Re: J1 Rebuild
makes sense! i have the slotted cams in mine, non adjustable, i have no idea if i have the close ratio gearbox, i have owned the bike 10years, i have never tested it against another ZXR to even know!
that said, i had a look at my cyl head, i have nothing stamped on it so i dont even know if it is a J or standard H! mine IS the H1 chassis, the engine is from that frame as well... the chassis number is really early compared to what I have seen - ZX400H001081
that said, i had a look at my cyl head, i have nothing stamped on it so i dont even know if it is a J or standard H! mine IS the H1 chassis, the engine is from that frame as well... the chassis number is really early compared to what I have seen - ZX400H001081
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Re: J1 Rebuild
Sounds like your bike has lost its original engine if there’s nothing stamped on block, both of my J1’s have a “J” stamped just under the R/H radiator bracket as Banner rightly says. Bummer...nice looking bike though, just put one of mine up in the classified section if you want another! haha.
You’ll know if it is/was a J1 by checking the frame number, if it starts ZX400H-300 (then 3 numbers) it’ll be a J1.
You’ll know if it is/was a J1 by checking the frame number, if it starts ZX400H-300 (then 3 numbers) it’ll be a J1.