Top end rebuild

[M.V.]

I had all the parts to do this, but I sold them with my old head

Anyway, time to do it! I'm going to order all the parts from the US, am I correct in thinking it's the TDM850 parts I need as the TRX was never sold in the US?

I'll hone the bores, replace the valve stem seals, rings & camchain, so I need valve stem seals, rings, all the gaskets the camchain, anything I've missed?

They only appear to list 0.5mm oversize rings for the TDM, will I be able to use these or will that not work? I suspect it won't...

Thanks in advance!

[Stu99]

Might be worth a PM to Cobba.
See if he has any of this left, might save you a few bucks.
http://www.trx850.com/phpBB_forum/viewt ... 33&t=10363

[Con Rod]

Hi MV,

I did this job earlier this year. Part ordered including part numbers and prices are here:

http://www.trx850.com/phpBB_forum/viewt ... &start=165

Yes, all TDM 850 parts and you just want standard size rings unless you are doing a rebore. I ordered from PartShark and ordered the hone (3-3/4" flex-hone) from ebay

[M.V.]

Love your work, thanks fellas!

[cobbadiggabuddyblooo]

Look at the option of a copper head gasket, not only reusable but you can get a thinner gasket made to raise the compression ratio a few points. Your not shaving material off the head then to achieve the same result. Std gasket thickness is 1mm . (0,75mm compressed)
Your copper gasket does not compress and the old guy who makes mine up gives me an option of 0.55mm , 0.9mm, 1.2mm.

[alextrx850]

Does the copper head gasket need any sealant for fitment Brian ?

[cobbadiggabuddyblooo]

Yes Alex,
I have some hylomar spray I'll be using on mine. Brett used the same when sealing his head gasket.
It's there to seal against coolant fluid leaks .

[M.V.]

Look at the option of a copper head gasket, not only reusable but you can get a thinner gasket made to raise the compression ratio a few points. Your not shaving material off the head then to achieve the same result. Std gasket thickness is 1mm . (0,75mm compressed)
Your copper gasket does not compress and the old guy who makes mine up gives me an option of 0.55mm , 0.9mm, 1.2mm.

I probably won't, though it's good to have the option, thanks for bringing it to my attention.

I'd prefer not to have to remove the head again in a hurry & the extra money is probably better spent getting the FCR's in my shed on the bike! Certainly more power gains than a couple of compression points

Not chasing power gains at this stage, just want to stop the oil burning.

Edit: Found the standard rings, about $200 US all up for the parts, plus freight, not too bad at all.

[bane]

Hi M.V, from which site did you order the parts from?

[M.V.]

Haven't ordered yet, but Partzilla.com is the cheapest, that's where I usually go. Used to be Partshark, but Partzilla is slightly cheaper & has Honda stuff also.

[Stu99]

I probably won't, though it's good to have the option, thanks for bringing it to my attention.

I'd prefer not to have to remove the head again in a hurry & the extra money is probably better spent getting the FCR's in my shed on the bike! Certainly more power gains than a couple of compression points

Not chasing power gains at this stage, just want to stop the oil burning.

Edit: Found the standard rings, about $200 US all up for the parts, plus freight, not too bad at all.

You have PM.