3XV Big Off rebuild

[yanw]

Can't really follow your post there, Yan? but you know the Yam flanges only fit one way round don't you?

I mis-read the picture that Dan took and thought that his barrel had the studs across the plane of the exhaust exit. My bad for jumping to conclusions.

Yes, the black gasket goo is the oe Yam stuff. Don't know what it is, but it must be bloody good, because it seems very heat/oil resistant.

I guessed as much as the nuts didn't look like they had been off (unlike the carbs).

Your set-up looks completely stock to me.

Cool. I will need to get some headers made up then. The LHS exhaust fits to a frame bracket but the RHS fits to the footrest hanger. I wonder if they are designed to fit "Jackal" rearsets?

[Paul]

Shame Yan. You have had a rough time with this lot.
Do you want to send me your barrels for a slight tune
You can owe me a carb clean.

[Warwick]

Aftermarket rearsets generally leave the exhaust hangar points in the same place as oe.

The upper cyl pipe will generally line up with the rear hangar point more easily as the physical position of the header affects the rear hanger point less than with the lower cyl pipe. The fact that your lower cyl pipe doesn't line up at the rear suggests to me that (and I'm speculating here of course) either it's proper flange piece should be deeper to push the pipe further back, or that they are SP pipes, designed for use with the oe cyl adapter piece in position - which would do the same thing with a slimmer flange?

I have some R type Jackal flanges here somewhere. I can try to root them out if you think it might help? 

[maccas]

Just measured a 3ma jackal flange and the measurements tie in with the flanges you have Yan. 74mm hole centres and the holes are centred with the exhaust bore. Inner diameter of central hole is is 37mm though rather than the 33mm you mention. Possibly 2ma flanges maybe? Anyway they aren't for a 3xv that's for sure.

Can you mount the pipes on their mounts at the back of the bike without the flanges fitted and take pictures of how far the header pipes are away from the cylinders?

I reckon you just need 3xv R model jackal flanges. The pipes look to be R model jackals from other pictures i've seen.

Dan

[yanw]

Can you mount the pipes on their mounts at the back of the bike without the flanges fitted and take pictures of how far the header pipes are away from the cylinders?

I will do this tonight when I get home from work.

Do you want to send me your barrels for a slight tune
You can owe me a carb clean.

I'll see if I can get it to run again before I take the barrels off Paul, otherwise it will be even longer before I get a go. As for the carbs just send them to me and I'll do them, you can pay me back at some point in the future. Remember I still have your SP crank (thinking about it do you really want me to open my engine while I still have your crank?  )

[Paul]

Hahahaha

[yanw]

OK, pictures of the gaps as requested. It looks like, to get them straight, that there is about a 3" gap.

Has anyone else had/fitted SP Tadao Jackals to their 3XV?

[yanw]

Has anyone else on the forum fitted Sp Tadho Jackals? It looks like the headers would need to be 3" long at least.

Any advice or pics would be great as Paul is hassling me to go to the dyno with him.

I still don't know if these expansion chambers are for a TZR. RGV maybe?

[peterbike]

I agree with macca.  Where are your manifold adaptors ?  Cast aluminium things about 3 inches long   

[yanw]

The problem is Peter that the manifolds I got with the pipes are not right. The stud spacing and positioning is wrong (and the length too). I'm trying to work out what I can do with them but have little experience and nothing to reference.

[maccas]

Yan,

Can you take some more pictures of the pipes please? I think I might have spotted some subtle differences compared to the pics of Jackals I have seen.

Here is what I have noticed. I have placed red arrows where the welds are. First your pipes:



And some sp tadao jackals stolen from the web:



I'll try and find a better picture of the pukka flanges

Dan

[maccas]

On the R/H pipe yours has two extra welds in the header. The header on the other pic I posted is a one piece stamped/formed jobby. The length of the stinger on the left pipe looks different too.

What I would say is they look to be made by SP tadao. The spring mounts are the same, where the cylinder flange mounts looks the same. The hanging brackets at the rear of the pipes are the same. The silencer mounting flanges look the same. DFR pipes have a strengthening sleeve that is cut at a funny angle there. OX pipes have triangular silencer brackets and they are stamped OX racing.

So, I believe SP tadao made pipes for the SPR too? I wonder if that is what we are looking at here? I'll do some more digging.

Dan

[yanw]

Thanks Dan, I've managed to get some pictures taken between all the major incidents at work...

I might put a post on the DS site to see if anyone there can identify them. I'm still not confident they are TZR.....

[yanw]

My post on the DS site has come up with this potential gem: "si.likes.guiness wrote: they look like the dogfight r's for the nsr mc21"

[Paul]

Could well be. That's a bummer.