OW12/13 "Replica" pipes for YZ250/360B

[firko]

These look pretty good.          http://www.vintagemx.us/cgi-bin/largephoto.cgi?C=H4jJh2dMJhbqnbsY&w=2
                                               
                                                                                 

FOR SALE
Ad # 3227656 December 19, 2013
 
Taking orders on 1975 Yamaha YZ 250/360B pipes. These pipes are obviously one off pipes and are built to mimic the look of the OW12/13. The lead time is usually about a month, so please plan accordingly. They will cost $400.00 and include muffler.

     Scott Sears
Colorado Springs, CO
Phone: 719-686-1809 | Email | Website
Registered Since 12/16/2012 | 7 Posts 

[Rossvickicampbell]

wrote to Scott - he is currently looking at postage options for overseas.  It may be that he makes the stinger separate and a slide on affair so that the whole pipe can fit into a standard post box.

[RED ALERT]

Keep me posted on these Rossco. 

[Rossvickicampbell]

no worries Rod - shall call around on 27th - Ok?

[RED ALERT]

Sounds good, I'll be here, off work for 4 weeks now 

[Iain Cameron]

I'll be in the market too Rossco please let me know the out come and shipping price . Iain

[Davey Crocket]

I've just got a PFR? one that I haven't taken out of the wrapping yet....same deal...R/H side for the pipe, I will get it out and have a captain cook.

[Rossvickicampbell]

DC - didn't know PFR made one for the YZ?  Any photos?  Did my header pipe turn up yet?

No worries Iain.

cheers

Rossco

[Davey Crocket]

I'll unwrap it, I bought a complete dismantled bike from Un Zud, it's residing at TMBills place over looking Lake Taupo....my niece and nephew just bought about 40 kgs of it over and haven't had a chance to unwrap anything yet. Might be a Circle F....that pipe sure looks nice Rosco....keep me in the loop.....merry Christmas....your header pipe hasn't turned up yet.

[firko]

The 'OW' pipe shown above looks very much like the Pro-form YZ250-B pipe on my Cheney RT1 and the pipe on my 'DT1 from Hell' built by Peter Reynolds in 1992. The 'Professor Pete' pipe is a lot fatter in the middle than the Proform and has a tapered header but the layout is very similar.
                                                                       
                                                                       

[Iain Cameron]

So the 250 and 360 pipes are the same shape are they . That's good if they are as Im hoping to run a RT2MX motor in mine till I get the 250 YZ motor built , looking at a Gaspro kit for the damper . Iain

[firko]

So the 250 and 360 pipes are the same shape are they . That's good if they are as Im hoping to run a RT2MX motor in mine till I get the 250 YZ motor built , looking at a Gaspro kit for the damper . Iain

I see that Pro-Form list separate pipes for the 250 and 360 but when I asked the guy I bought my Pro-Form pipe from (on Swapmeet) he explained that he raced both 250 and 360 YZ-B's and reckoned the only difference between the two was the stinger and a slightly different shaped rear cone. He told me the pipes were interchanged with no noticeable difference. I had to cut and shut the stinger , trim some fins on the RT2MX head and modify the header so it would fit the RT1 exhaust flange but it otherwise fits like a glove on the Cheney frame. You'll no doubt find the same problem with the different exhaust flange arrangement between the YZ and RT2MX Iain but it's a fairly easy fix.

[Rossvickicampbell]

Iain - in the meantime - coz of what Firko is saying - I have recently sent a YZB header pipe to DC for fab of a replica one.  Can have that sent down to you to check it out if needed when it is finished with?

[firko]

It's not the angle of the flange to pipe header being different, they're exactly the same. The difference is that the RT2MX header slips into the bolt on flange while the YZ slips into the actual cylinder casting and is a 2mm larger inside diameter....which is what prevents the pipe slipping into the flange. The allow the YZ pipe to fit the flange I brazed a smaller diameter pipe inside the YZ flange and voila! it slipped into the RT1 flange like a cock into a sock.
                                                                                   

[Rossvickicampbell]

Scott has come back and said he has had a lot of interest from Australia straight up - maybe 5 pipes.  Is anyone interested in being the receiver of a single delivery and then send out from there - if it saves postage?  I am overseas so cannot do it?

cheers

Rossco