TZR250 Fix Up (AKA Proud Owner of...) 2015 Thread Revival!

[ms51ves3]

[ms51ves3]

Started working on it today. So far I've drained all the fluids (2 stroke oil is draining now), and removed the 2 exhausts. Both exhausts were absolutely full of oil, here's a video to demonstrate how much.

Clicky

Just out of interest does this have real expansion chambers or is it another Yamaha that has a catalyst in the expansion chamber?

After a little WD40 and a rag the exhaust came up quite nicely.

https://i15.photobucket.com/albums/a376/ms51ves3/DSC00666.jpg

https://i15.photobucket.com/albums/a376/ms51ves3/DSC00667.jpg

Up the exhaust port of the right cylinder.

https://i15.photobucket.com/albums/a376/ms51ves3/DSC00670.jpg

https://i15.photobucket.com/albums/a376/ms51ves3/DSC00671.jpg

Hopefully later on I'll have a video of it running. This really depends on if it will spark which I haven't tested yet.

EDIT: It runs No video as I think the float bowl is leaking and the tap leaks when on prime. Plus because of the leaky tank I didn't have long to run it but it does run

[Kickstart]

Hi

My TZR250 and my YSR50:-

https://www.alfa-pages.co.uk/TempPicture/YsrTzr.jpg

Hence why I am keeping an eye out for a TZR125 to get a set.

I pulled the top end off the TZR250 last weekend. It was showing 8 bar on the o/s cylinder and 10 bar on the n/s cylinder. Nothing obvious wrong though. Found that the pipe for the power jet on the o/s carb is missing.

Ordered a few bits. Have a pair of new standard Yamaha faired in indicators (mine is a Japanese market model with faired in indicators), just arrived. New clutch cable to go on. Couple of decent exhausts, pair of not so good exhausts and a pair of expansion chambers. Have some rebuilt forks and a shock to go on. New piece to go between the side panels behind the seat.

Could do with some spare wheels.

All the best

Keith
____________________
Traxpics, track day and racing photographs - Bimota Forum - Bike performance / thrust graphs for choosing gearing

[ms51ves3]

[ms51ves3]

When I got home from work I had the task of finding the hole in my tank, so out came the dremel, starting taking the paint off around the area that had stained paint and all of the sudden my dremel went through the tank, I had found the hole. I continued to get all the rust out and here it is:

https://i15.photobucket.com/albums/a376/ms51ves3/DSC00672.jpg

First of all I gave the underside of the tank a clean as it was pretty manky. Came up quite nice but there are several rust patches.

https://i15.photobucket.com/albums/a376/ms51ves3/DSC00674.jpg

I fixed the hole with some solder and a soldering iron. Then after I had soldered it I used my dremel to grind the solder back down to the profile of the tank.

https://i15.photobucket.com/albums/a376/ms51ves3/DSC00676.jpg

https://i15.photobucket.com/albums/a376/ms51ves3/DSC00677.jpg

Once I get to work I will pick up some touch up paint to repaint that area and also touch up some parts where the tank has been dented and the paint has come off.

[Kickstart]

[ms51ves3]

[Kickstart]

[ms51ves3]

[Kickstart]

Hi

Is the switch there at all. Likely the block connector it attaches to is part of the switch.

All the best

Keith
____________________
Traxpics, track day and racing photographs - Bimota Forum - Bike performance / thrust graphs for choosing gearing

[ms51ves3]

[Gazdaman]

£1 says the side stand switch has been removed all together.

Good project. I enjoyed my TZR 250 project. Those 2mas are fun to ride aswell. They'll lift the front on power.

Gaz

[Kickstart]

Hi

Well, Charlotte dropped my TZR250 barrels into the local bike engineers yesterday to get them properly measured. They are worn and are on their standard bores. Getting rebored to first oversize and new pistons.

Oh the fun of running in.

All the best

Keith
____________________
Traxpics, track day and racing photographs - Bimota Forum - Bike performance / thrust graphs for choosing gearing

[ms51ves3]

[Kickstart]

Hi

Air filter is just a piece of foam.

Yamaha sell the bits for the fuel tap. Looks like there is just a washer and O ring in the tap, part numbers 47X-24523-00 and 2G2-24534-00 respectively.

All the best

Keith
____________________
Traxpics, track day and racing photographs - Bimota Forum - Bike performance / thrust graphs for choosing gearing

[ms51ves3]

[Kickstart]

Hi

Deeply jealous of the condition of the fairing V piece.

With the mudguard I would be inclined to just try and source another. Think it would be quite difficult to repair it while having it looking good and being strong enough.

All the best

Keith
____________________
Traxpics, track day and racing photographs - Bimota Forum - Bike performance / thrust graphs for choosing gearing

[ms51ves3]

[Kickstart]

Hi

Think the last 2 digits of the part number refer to the colour scheme (think NJ is blue). Yamaha part numbers are an old style system where the numbers are meaningful. Very useful.

At least you had a more productive day. Got the swinging arm out (pretty easy) and cleaned it up a bit. Reassembled with the rebuilt shock. Also stripped the rear caliper. Cannot get the rear brake to bleed through. It was OK at first (too spongy but within reason) but then lost pressure. Cannot see any leaks from the caliper and everything looked OK. I suspect the rear master cylinder seals have just packed up from the effort of pumping everything through.

Another thing to add to the shopping list.

And that site lists the fairing V piece in the right colour.

All the best

Keith
____________________
Traxpics, track day and racing photographs - Bimota Forum - Bike performance / thrust graphs for choosing gearing

[ms51ves3]

[Kickstart]

Hi

There are 2 main seals in the master cylinder. One inner one generates the pressure when you pull the lever / press the pedal while the other just seals the fluid in (and probably an outer dust seal as well).

I have a car engine hoist that I used to support the back of the bike.

All the best

Keith
____________________
Traxpics, track day and racing photographs - Bimota Forum - Bike performance / thrust graphs for choosing gearing

[ms51ves3]

[ms51ves3]

Air filter foam is like £5 and a new TZR250 air filter is something like £5.50. I was going to use a sponge but I don't have one big enough. Might have to order one anyway

[Gazdaman]

https://www.gaz-racing.co.uk/images/vehicle_139.JPG

Pfft, ammo box and a piece of wood straight under the expansion pipes.

I wouldn't bother replacing the side stand switch. They only go wrong. I would bridge that connector better though.

Your fairings look in excellent condition!
My TZR had k&n pod filters, but YPM racers have reported they can play absolute havok with power. Reducing it dramatically!

Did you have a read of my project? Some of the stuff might help you. (Probably not though).

Gaz

[ms51ves3]