Hatori Anti Vibration Mounting

[Steve]

I've been thinking for a while about changing the muffler on my Vibe but hadn't really done anything about it until Leebert posted last weekend looking for a 2nd hand 90 silencer. That was it, job done, deal made and the MP2 was in the post, so I ordered myself one of these -> http://www.fast-lad.co.uk/store/hato...ke-p-1758.html

It's a Hatori pipe designed especially for the YS90SR engine, like what I've got. Apparently it's a Todd Bennet Special pipe, whoever he is?

Ordered it Saturday, and it arrived today.

I've just starting assembling a TRex 600 last night, so I thought I'd pop into the workshop, spend a few minutes fitting the new pipe and then get on with the Align.

Oh no, not that simple, an hour and a half later, I've finally finished the exhaust!

It's long, that's for sure - about 315mm tip to tip.

The header fits to the engine without any bother - 2 cap bolts, bit of epoxy glue and job done. Then trim the engine cooling duct (on the Vibe anyway) a little, then try and fit the four cap bolts and the anti-vibration bits between the header and the exhaust. Firstly, they're just a tad too short, so had to dig out some longer ones - no real bother. Secondly, getting the nuts on the back of the bolts is a nightmare - you need more patience than I've got!

Also the nuts have a weird tapered and knurled edge to them, which after a couple of attempts (didn't mention this in the instructions!) I realised that the taper needs to go inbound - towards the header so that it grips the metal and you then don't need a spanner on the back to hold it while tightening up.

So a 5 minute job took 90 minutes!

[moonmanflyer]

Yeh they do take a bit longer to fit but worth it, good pipes the hatori's

[Aidi]

Good God... Thats a big pipe! Last time i saw something like that was in Ann Summers!

[Steve]

Good God... Thats a big pipe! Last time i saw something like that was in Ann Summers!

Big price'n'all!

I hope it works ok after all the cash and the bovver!

Oh, and when were you last in Ann Summers?

[Tim Procter]

May be different to yours but I bought a Hatori 939 for my 700 and looked at it and thought that's going to be a pig to fit.

I took it in my head to fit the header to the pipe first (very easy) then mount the header and muffler complete to the engine via the two main mounting bolts.

I bit fiddly but job done in 15 minutes.

[Steve]

May be different to yours but I bought a Hatori 939 for my 700 and looked at it and thought that's going to be a pig to fit.

I took it in my head to fit the header to the pipe first (very easy) then mount the header and muffler complete to the engine via the two main mounting bolts.

I bit fiddly but job done in 15 minutes.

Can't do that with the YS engine - the header to engine mounting bolts are a lot closer together than on an OS, so you have to fit the header first, as the bolts are then hidden by the exhaust when it's fitted - see the 3rd photo.

[Tim Procter]

Can't do that with the YS engine - the header to engine mounting bolts are a lot closer together than on an OS, so you have to fit the header first, as the bolts are then hidden by the exhaust when it's fitted - see the 3rd photo.

Yes I see it and it does look tight but I don't think its much different to mine on the OS unless I'm mistaken..

Hard to see on this shot but the nuts are hidden behind the header plate.

Forget the white arrow, That was for another subject..

[robgt]

Apparently it's a Todd Bennet Special pipe, whoever he is?

He designed the Synergy N9 with Jason Krause
Cheers,
Rob

[Steve]

The head of the header-to-engine cap bolts are completely obscured by the muffler flange. No chance of getting anything on them once the muffler is attached to the header.

[headcase]

You definately can not fit a YS header to the muffler first & then fit the whole lot to the engine, the muffler mounting covers the mounting bolts for the header.

Ref the threaded inserts, these recently caught me out as the older headers were themselves threaded so you just fitted the header to the engine and then attached the muffler with the 4 bolts, so i did the same with one a bought a few weeks ago and wondered why the bolts wouldn't screw in & hold at all! Once i twigged what was going on i removed the header, then used a muffler mounting bolt to pull each insert into place and then reattached the header and then the muffler.

Agree that the instructions could be a bit better!

Regards

Brian

[Steve]

Yes, like headcase says.... here is the header to engine mounting bolt...

[Steve]

Gave it its first go last night. Needs some needle-twiddling to get right as I've also changed fuel, but first impressions are it's a bit quieter than the MP2. Gives a funny warbling noise under certain running conditions like hovering - seems to be more sensitive to the needles. I need to look at the mid-range and high end needles some more.