Yamaha TRX850 Enthusiasts Forum

Just wanted to verify that i remember correctly here....
It´s this TDM kit wich also fits TRX right!?

KETTENSATZ YAMAHA TDM 850 (4TX)
TDM850 BJ96-98(114/17/42)

96 - 98 TDM front sprocket is the same as TRX but I think the rear is different. TDM900 rear is the same as TRX I think.

PCD of 850 is 140mm
PCD of TRX and 900 is 150mm

But could be wrong

Also stock rear on TRX is 39 tooth

martin young wrote:96 - 98 TDM front sprocket is the same as TRX but I think the rear is different. TDM900 rear is the same as TRX I think.

PCD of 850 is 140mm
PCD of TRX and 900 is 150mm

But could be wrong

Also stock rear on TRX is 39 tooth

Yeah, i want to go 17/42 instead of 16/39.
Guess i just buy pieces then....for safety!
Although im pretty sure one of the TDM 850 kits where a fit....there are three different...hmmmm.

What options do you have?

Looks like the TDM900 kit will fit. 16/42 118 link.

martin young wrote:What options do you have?

KETTENSATZ YAMAHA TDM 850 (4CM)
TDM850 BJ.91-95(114/16/44

KETTENSATZ YAMAHA TDM 850 (4TX)
TDM850 BJ96-98(114/17/42)

KETTENSATZ YAMAHA TDM 850 (4TX)
TDM850 BJ.99-01(114/16/43

TDM 900 not listed on the site i´m looking at....

martin young wrote:Looks like the TDM900 kit will fit. 16/42 118 link.

Prolly got to loose a lot of those links heh!?
Got 16/39 and 110 now and i´m all the way back!

Yep, 42 rear is a TDM900 option (tis what I've got)

If you dont want to cut out some links I have a 48 rear sitting on the garage wall. It's a bit ambitious for my chain at the moment.

I have 16/39 fitted. I didn't realise a 42 was so easily available. Always getting stooged down at the bike shop with them saying "nah mate this wont fit, that wont fit."

Good luck getting the right one mate.

Killerwhale wrote:Yeah, i want to go 17/42 instead of 16/39.

Worked for me, much better gearing for track days than standard.
You have to get a TRX/TDM850 front sprocket and a TDM900 rear. Standard length chain (110 links?) will fit.

jpe wrote:

Killerwhale wrote:Yeah, i want to go 17/42 instead of 16/39.

Worked for me, much better gearing for track days than standard.
You have to get a TRX/TDM850 front sprocket and a TDM900 rear. Standard length chain (110 links?) will fit.

Ahh, it was the front of the TDM 850 wich fits!

Cheers mate!

I was in my friendly local Yamaha dealer today, and could he find a 16T front sprocket for me? Could he b*llocks!

In its OE configuration, there's no other sprocket listed as a direct 16T replacement for the standard item. The TDM sprocket has a different flange thickness (allegedly) so using one as a direct replacement on a TRX will cause chain alignment issues.

The other option is to use a 525 chain (or a 520 - whichever isn't standard) and get a chain/sprocket set....

What has anyone else done??


Greg.

There are 3 different TDM front sprockets

up to 95 and 99 on

96 - 98

900

The 96 - 98 is the same as the TRX (see my first reply).

Greg - try Kedo. They list 15, 16 snd 17 tooth front sprockets for the TRX in 525.

Ive got a 17 front and 42 rear with a tsubaki 525 chain, works nice.

http://www.bandcexpress.co.uk and ace for all sprocket options: good prices, good service.

I'm running standard rear and 16 front. Cos the YZF rear wheel/180 tyre is bigger diameter it's about the same as standard gearing. Could do with going a bit lower really.