3XV Big Off rebuild

[maccas]

Pretty sure they aren't dogfights. They have a very distinctive sleeve near the silencer flange i'll get you a picture to show you what i mean later Yan.

Dan

[maccas]

Dogfight pipes have this sleeve near the silencer flange Yan. it's quite distinctive with being at an angle like that.



Dan

[maccas]

Dogfight NSR pipes here:

http://page6.auctions.yahoo.co.jp/jp/auction/f131607236

Totally different.

Dan

[yanw]

Thanks Dan. The search continues....

[maccas]

Yan!

*News Flash!!*

I've cracked it. They are SP Tadao pipes for a 3xv SPR 100% on this.

The SPR has a cast iron extension from the exhaust port for the standard pipes, it's about 2" long. It looks like the SP tadao pipes keep this extension in place. I have found a picture of an SPR fitted with SP tadao pipes and this cast iron extension piece is in place. I'm still not sure if you have the correct flanges, they look right but an SPR owner with the extension piece or standard pipes would have to confirm that. Here are some SP tadao SPR pipes for sale in Japan:

http://www.redbaron-parts.jp/popup/entry18626-0.html

I'd say they are the same as yours for sure.

I also found some more pictures I had saved a few years ago here:





This last pic is of a set fitted to an SPR that I found on the old old old forum. You can see the cast iron extension piece in place. The spring loops are the same as yours and the flanges look right too.



So you have a choice. Sell them to an SPR owner or get a flange made up to join the pipe upto the cylinder and see how the bike works. SPR porting is quite different from 3xv30 barrel porting but you never know it might work ok?

Dan

[yanw]

W00t! Dan, you are a true hero. I owe you big big big time 

I owed you big time before this but now I am even more in your debt. I think you must have the best knowledge of TZR expansion chambers outside of Japan 

I think it would be best if I try and sell them to a SPR owner first. They will be set up for the SPR porting and powervalves.

Happy days, some light at the end of a rough week!

[yanw]

OK, latest flaming barrel....

I went to bleed the autolube tonight so I could do a write up and the brass pipe that the rhs line goes on snapped off when I tried to take the oil line off. It was bent in the crash and obviously weakened. Bum.

I'm looking for a replacement however I may have a cunning repair. Watch this space for an update and for Paul to tell me to go pre-mix  .

[yanw]

Here's a picture of the snapped "brass bit" from my oil pump (bottom left) and a complete one (bottom right). As well as providing a "take off" for the smaller oil line there is a spring and ball bearing to prevent flow return (and the oil line draining back). The TZR250 one is similar in function to the RD500 but where as that is in three pieces (brass, spring and ball bearing) the TZR one is one unit with the ball and spring held captive in the tube.

A new oil pump for the '93 onwards is 189euro from CMSNL however after reading some bits on the RDLCcrazy Facebook page and having a despondent surf of the net I realised that the "brass tube" was a push fit. I had a TZR250 mechanical oil pump in my box of bits (I was considering a future retro conversion) however I removed one of the "brass tubes" and it was identical to the broken one.



So now the oil pump is fixed I have returned to bleeding the oil system. Only I have had another flaming barrel come down at me. It looks like the left solenoid is jammed and won't open/bleed correctly. However all is not lost; Dan Williams at http://www.geckomotorcycles.co.uk/ has sorted me out a second hand "solenoid rig" for a very reasonable price. Thanks Dan, you're a real gent.

Just for reference there is a guy on the RDLCcrazy forum called "Arrow" who does lovely restorations of Yamaha 2T oil pumps. He can also uprate them for bigger bore capacity/increased flow. His results look like new.

I have started to write up my comprehensive guide to TZR solenoid oil pump systems with how-to and fault finding. I am getting very knowledgeable on the subject however I think I would have preferred to have remained ignorant

[ybk]

Nice! A bit of good luck always helps to keep going! The mechanical oil pump is certainly easier but I applaud you for tackling the solenoid version, I've had a look at the manual on bleeding the system it seems more like nuclear fusion instructions.

[Paul]

ja, these oil pumps are proof that we are slaves to convenience

dont go premix yan, you'd spoil a good thread. lol

[yanw]

I've not been able to do much recently what with parents/parents-in-law popping off this mortal coil :-/

The only time I've had is to try and dry fit the tailpiece I got from RC45.



Which picture looks best to you guys? #2 has the front of the tail-piece line up with the tank but is the back now too droopy?

I'm still trying to sell those sweet 3XVC pipes I got mis-sold so I can afford some ones for my bike. It's looking like I might have to fab some headers as no one wants :-(.

I might get some time once the kids go back to school, assuming the mother-in-law lasts longer than 3 hours out of hospital this time. The kids could be down 75% of their grand-parents this year at this rate and it's not September yet....

[Paul]

No 3
At least you're still with us Yan
Sorry about the parents bud

[stevewr250]

Condolences Yan
Yep definitely number 3

[jcsnook]

So sorry to hear about the parents Yan.

I like the tail piece, it looks cool! 

[jools]

No 3 mate, but you should try and lower the rear end slighty so the join at the tank is parallel - it sort of drags you eye away from the rest of the fit.

Condolences on you bereavements too buddy.

Jools