Triumphrat

gripperod · 11-19-2012, 01:58 PM

OK so I have the 900 daytona engine with a holed piston, and I have a set of 750 pistons

. And I am now considering wrestling it all onto my workbench to build my "special" engine for my S3 so I'm perusing the World of Triumph website checking out part numbers and looking at a new set of rings when I notice the centre piston has a different part number

(closer tolerence I believe). I have had a quick look at the pistons and can see nothing obvious.

Soooooooooooooo how do I identify the centre piston, any ideas?

t552 · 11-19-2012, 05:57 PM

No difference as far as i am aware. just cherry picked.

triplestrength · 11-19-2012, 06:00 PM

Measure the diameter? Two should be the same and one different.

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Bike Whisperer · 11-19-2012, 10:33 PM

There is most certainly a difference. Was just checking the invoice for my Speed Triple which had the short strokes installed when new. The centre piston has its own part number, and is I s different diameter to account the extra heat expansion.

KitNYC · 11-19-2012, 11:20 PM

I don't guess the part number matters much, as long as the #2 piston meets the spec for a #2 piston. FSM has the specs in it; I can look 'em up if you don't have it, but I'm not ready to get off the couch just yet and my manual is across the room.

Cheers,
-Kit

gripperod · 11-20-2012, 04:12 AM

Quote:

Originally Posted by KitNYC

I don't guess the part number matters much, as long as the #2 piston meets the spec for a #2 piston. FSM has the specs in it; I can look 'em up if you don't have it, but I'm not ready to get off the couch just yet and my manual is across the room.

Cheers,
-Kit

I would like to claim "great minds think alike" and I couldnt be bothered to dig out my manual, however, I just didnt think of checking the specs

(although in mitigation, I am used to Haynes manuals where that sort of stuff isnt usually included). I will check the manual - Thanks Kit.

bp

KitNYC · 11-21-2012, 01:35 AM

No problem. good you have the manual, as I'm back on the couch again!

BTW, from memory, it's not so much different from the other two as it is more in spec than they are.

Cheers,
-Kit