Will I need to rejet?

[BoltonSte]

The pipework on my curvey is looking a bit grotty and needs a damn good polish, I also have an M4 system sat in the cellar in good nick. If I put the M4 system on with my road legal quill will I need to rejet or is it the can that really controls the flow?

I know that if I take off the standard system that it will take me a while to clean it up.

Cheers

Ste

[Razor]

The M4 pipework is reputed to flow better and most definitely recommended for a rejetting. However, adding the wrinkle of a Quill (T3?) can makes me wonder.

I could swop you a replacement clean standard exhaust system for that pesky M4, it must be getting in the way whenever you venture into the cellar for a fresh bottle of vino...

[Dangerous Dave]

Yes a rejet would be a good idea for an M4 system, I'm not to sure your Quill can will fit on the end of the standard M4 pipework as the M4 is a larger bore!!! Quill and most common exhaust are a 50mm bore (common for all bikes) but the M4 is larger than 54mm, I know that as my old remus didn't fit and my MOT friendly LeoVince wouldn't fit with out the modified connector!

[northwind]

"Oh and a tillis motor." ?

I don't know much about quills, they're the ones that are quiet at idle and loud when opened up aren't they? More or less a pure race can with a flap in it. I reckon rejetting would still be a good idea if that's right.

Their latest cans are absolutely gorgeous though, titanium pr0n.

[BoltonSte]

Ah well if it needs rejetting then I'll just Autosol the stock, just cause I'm lazy.

Razor, yeah I'm always having to move it out of the way, I may junk it one of these days;)

Northy, that is on the other bike,:twisted: this one is PBx's old bike as I was getting sick of not being on the road.

Cheers Folks

Ste

[yorkie_chris]

"Oh and a tillis motor." ?

I very much doubt M4 system for a curvy will fit on TLS motor.

Also how did you get that to fit?, did you have to machine the engine mounts or the frame?

[BoltonSte]

Yeah it won't fit as the cylinder offset is the opposite way round from the SV.

Blood sweat and tears, theres some mounting tabs and a couple of mounting brackets using the stock SV engine mounts and the TL.

The bike initially in question is a 'normal' SV, as I still need to sort out the airbox for the special one.

[Robw#70]

With a std filter and system esp with the quill can it wont be a million miles out, should be safe, just fit it and try

[BoltonSte]

Well, the Quill can fits the M4 pipework, in case anyone else wanted to know.

Now I just need to get the bleedin front downpipe off and I'll be good to go.

Anyone got any tips? It's been dowsed with releasing oil for the past three days and still no joy.

Ste

[Alpinestarhero]

You tried applying some heat?

[yorkie_chris]

Grind the side of the nut off and tap it round with a punch if its properly stuck, try not to go too far into the stud.

Then to get the stud out just worry at it until it goes, dizzyblondes were so well stuck that I had to heat and cool them several times, heat them then shock cool the stud with penetrating oil etc etc. Then when I reckoned they were ready, put a wet rag on the stud (a potato works too) and heated the alloy up to "bouncing" hot (where you spit on it and it doesn't fizzle)

They popped loose easy enough after all that!

Then refit some new studs with loads of copperslip

[BoltonSte]

Should have been clearer, studs are out.......actually came out of the head as the nuts were ceased on that much they just acted like bolts.....it's actually the header itself that I can't get free.

[yorkie_chris]

In that case batter it! Once again heat may help, and penetrant oil.

Remember to heat the head, cool the pipe to get maximum advantage.

[BoltonSte]

I'll be getting the blow lamp out when I get home, piggin nightmare at the moment.

Whohooo, job done, wet towel, blow lamp, mallet and oil. Can't believe it was so mch hassle considering how shallow into the head the go.

Ste

[BoltonSte]

Quick update incase anyone wants to know, the quill linkpipe fits the M4 system, and the quill fits the M4 linkpipe, however as the M4 system is set up for an oval can, there is a bit of a clearance issue with the swingarm, enough if you want to get to an MOT but I'd be a bit concerned on full compression. Unless you've got an oval can then all is good.

Ste

[northwind]

What Quill is it by the way? I've been eyeballing their tri-ovals, the really light weight ones, rather sexy...

[BoltonSte]

Tis just th bog standard round T3.

I think I got it before everyone had started with the Triovals and the like, gotta be said though it's now done 15 - 20K and has deepened a little in tone, got a few scratches but overall has beared up pretty well.

[Stevetmanchester]

A little bit off topic, but i have just put a K & N filter in my SV curvy this wouldn't require a rejet would it?

[jambo]

A little bit off topic, but i have just put a K & N filter in my SV curvy this wouldn't require a rejet would it?
K&N filter for the curvy IIRC wasn't supposed to flow a lot better than stock (you can wash it though) so no need to re-jet.

Jambo

[northwind]

Yeah, it's not very effective as a performance filter so you can often get away without rejetting, though I think a lot of people end up in that awkward situation where the bike really wants it, but the benefits are going to be small so it's barely worth it.

[Dangerous Dave]

the quill fits the M4 linkpipe
I take it you have a Pointy???

I know for a fact that the standard Quill SV can will not fit a Curvy M4 full system!

[BoltonSte]

Nope, curvy. Bought the can as a curvy can years ago and the M4 system came off a curvy as well.

It clamps up, just not in the best position, hence the quill link pipe being used if needed it will clear the swingarm OK jst not confident enough to ride round with it like that long term.

[Dangerous Dave]

Are you sure, they are both two different diameters. The SV Quill is about 51mm and the M4 is nearer 57mm....
http://www.jhsracing.co.uk/archive/common/gallery/images/usd.jpg

[BoltonSte]

Don't know what's going on there then, but the quill can deffo fits onto the M4 linkpipe (linkpipe inside can, as can has the splits) and the quill linkpipe deffo slipped onto the M4 system and clamped up fine. And yes the system is the same as the one in the pic.

Unless they changed it, if I ever have the can off agin I'll measure the diameters to check.

Ste