1989 ZXR250A1

Here's a chance to show off your zxr400, so get them digital cameras out and show us some piccies.Rebuilding your bike or modding it then let everyone in on it.

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banner001
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Joined: Sat Sep 24, 2011 3:27 pm
My Bike: ZXR400 L4
Location: Nuneaton

Re: 1989 ZXR250A1

Post by banner001 » Wed Jul 31, 2019 7:41 pm

Oh it's gonna sing its little lungs out :smt007

Couldn't do any thing before I finished the 400, am gonna fire it up in a minute as I've been able to get the throttle cable attached - the previous owners have slightly broken the plate the throttle cables attach to, so I can only use the decelerator attachment slot.

Needs an airbox still so I'm still expecting it to run a bit ropey and will ha e a high idle for sure , but will be good to get some fuel through it and actually give it some throttle action - was all done on the idle adjuster before.
UK ZXR 400 L4
UK ZXR 400 L3 track bike
1989 FZR 1000 EXUP-R streetfighter

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banner001
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Posts: 2348
Joined: Sat Sep 24, 2011 3:27 pm
My Bike: ZXR400 L4
Location: Nuneaton

Re: 1989 ZXR250A1

Post by banner001 » Wed Jul 31, 2019 9:10 pm

Fires up but won't run under 4k rpm without a lot of choke, gets better as it warms up, so I'll have to properly sonicate the carbs and the jets... Could be down to the airbox, could be the fact it's not been reved in over 14 years :excited

When I first fired it upast year it was just a test to make sure that it did fire, so it ran for about a second... This was several minutes of decent revs, got the temp gauge almost half way, coolant is pumping fine with no leaks, a few oil leaks but will sort them in time. Alternator and reg rec seem fine, no electrical gremlins so far so can't complain :smt003
UK ZXR 400 L4
UK ZXR 400 L3 track bike
1989 FZR 1000 EXUP-R streetfighter

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BigB
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My Bike: ZXR400 H1
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Re: 1989 ZXR250A1

Post by BigB » Thu Aug 01, 2019 1:37 pm

amazing! genuinely need to see it finished! will the 400 airbox fit on it? i think i have a spare H air box

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banner001
Track day God
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Posts: 2348
Joined: Sat Sep 24, 2011 3:27 pm
My Bike: ZXR400 L4
Location: Nuneaton

Re: 1989 ZXR250A1

Post by banner001 » Thu Aug 01, 2019 11:16 pm

Cheers for the offer but no it's a very different airbox, so the bike uses a vacuum petcock so no fuel pump, and the reg rec is under the front of the tank, so there is a void from the battery to the carbs, this is where the airbox goes.

So it goes from the carbs down to the area above the starter motor, exits through a tube under the frame on the lhs of the engine and to a scoop on the lhs fairing... Yes that's right... Its a native ram-air system with a pressurised airbox!!

Hence why it runs massive main jets, 32 mm carbs (same as the 400), but is on 128 main jets as stock! (zxr400 is 95 main jets) :smt007
UK ZXR 400 L4
UK ZXR 400 L3 track bike
1989 FZR 1000 EXUP-R streetfighter

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