Yamaha TRX850 Enthusiasts Forum

I did a search but couldn't find anything relating to import TRXs, so I apologise if this has been asked before.

I have a nice white on red Japanese import. The front calipers are Brembo 4 pots and the master cylinder is Nissin. I'm guessing this is the standard set up for J-spec bikes, from what I've found.

What size bore is the Nissin master cylinder please? Is it 5/8" like the official bikes? And are there any levers available that reduce the span from the bar to the lever? I'm considering trying a 15mm Brembo master cylinder from a 748 (if I can find one) to try and give more 'feel'. The set-up on the bike seems a little wooden to me, probably not helped by the stretch to the lever.

5/8" but yours could be non-standard. the bore is marked on the back of the cylinder.

you could fit an R6 lever, this has a different span adjustment to the TRX lever.

Just looked at mine, on the back you should have 5^ (is a triangle after the 5) 5/8. Have you got braided hose ?

I like my Brembo's they work well with 2 fingers, but it also depends what your used to.

Dave E

Hi Kayla.
A little late in replying to this (I been busy) but I have the same bike as you White and Red Japanese Import.
I had problems with my front brakes in that they had very little feel, heres how I fixed mine.
Push the brake lever away from the bar, were the lever makes contact with the master cyclinder, put a touch of oil or grease on it, that solved that problem.

Kayla wrote:I did a search but couldn't find anything relating to import TRXs, so I apologise if this has been asked before.

I have a nice white on red Japanese import. The front calipers are Brembo 4 pots and the master cylinder is Nissin. I'm guessing this is the standard set up for J-spec bikes, from what I've found.

What size bore is the Nissin master cylinder please? Is it 5/8" like the official bikes? And are there any levers available that reduce the span from the bar to the lever? I'm considering trying a 15mm Brembo master cylinder from a 748 (if I can find one) to try and give more 'feel'. The set-up on the bike seems a little wooden to me, probably not helped by the stretch to the lever.

Kayla

Can't be of much use directly as I don't have a JDM bike, but FYI the later bikes also have Nissin master cylinders. I guess Sumitomo don't do their own MCs.

Assuming your import has an adjustable lever, I would definitely recommend setting the span to minimum, fitting braided hoses and a thorough bleeding. That should keep the lever firm even on the smaller lever span setting. Just seems a little more reliable as a solution than a 748 MC.

If you find it's wooden, it might be just as cheap to fit blue spot calipers from a YZF600, R6 or R1 along with the YZF master cylinder (like everyone and his dog on here). Total cost about £100 via e-bay. The smaller internal diameter of the YZF MC gives lots of feel, as long as you keep the calipers and discs clean, and the blue spots have tons of power.

Thank you all for your replies. I'm kind of reluctant to replace the Brembos as they look so nice and they do do a good job of stopping the bike, but the lever just feels wooden. I reckon a 15mm Brembo m/c would work better than the 5/8 (15.8mm) Nissin, giving more travel and feel. I had an SZR with twin 40mm Brembos and a 15mm m/c and they were incredible.

I guess I'm just running into a few teething troubles that anyone goes through when they get a bike that's new to them.

Kayla wrote:Thank you all for your replies. I'm kind of reluctant to replace the Brembos as they look so nice and they do do a good job of stopping the bike, but the lever just feels wooden. I reckon a 15mm Brembo m/c would work better than the 5/8 (15.8mm) Nissin, giving more travel and feel. I had an SZR with twin 40mm Brembos and a 15mm m/c and they were incredible.

I guess I'm just running into a few teething troubles that anyone goes through when they get a bike that's new to them.

Ah, the SZR, the OTHER underrated mid-90s Yamaha. A potentially great £500 track bike, especially if one has a spare CR500 motor lying around.

*thinks* I bet the drive would be on the wrong side *thinks*

idl1975 wrote:

Kayla wrote:Thank you all for your replies. I'm kind of reluctant to replace the Brembos as they look so nice and they do do a good job of stopping the bike, but the lever just feels wooden. I reckon a 15mm Brembo m/c would work better than the 5/8 (15.8mm) Nissin, giving more travel and feel. I had an SZR with twin 40mm Brembos and a 15mm m/c and they were incredible.

I guess I'm just running into a few teething troubles that anyone goes through when they get a bike that's new to them.

Ah, the SZR, the OTHER underrated mid-90s Yamaha. A potentially great £500 track bike, especially if one has a spare CR500 motor lying around.

*thinks* I bet the drive would be on the wrong side *thinks*

Nope, both bikes have the drive on the left side

The good thing with the SZR is the fact you can go from 170kg or so wet, down to about 145-ish easily and without spending lots of money. I'd love another one. First bike I got my knee down on and I wish I hadn't sold it

But then would you have bought the TRX?

Dave E

slow codger wrote: But then would you have bought the TRX?

Dave E

Eventually, probably, maybe. I'd definitely have wanted something with a bit more oomph, that's for certain.

Agreed on that, I had an SRX600 race tuned, great on twisty B roads, crap on any straight. If you want something like that try a proper supermotard.

Dave E

i found that greasing the lever pivot helped no end with brake feel.

I tried lubricating the pivot but was still not happy with the feel - still felt wooden, (I have Nissin MC and Brembo calipers with braided lines) so I fitted a Nissin radial MC from a 05 Gixxer. Much better feel and stops very nicely

R1 or R6 mc is the cheapest and most widely available upgrade to 15mm (that's what I've got and it makes a world of difference)

phuk72 wrote:R1 or R6 mc is the cheapest and most widely available upgrade to 15mm (that's what I've got and it makes a world of difference)

Is that using the standard calipers or blue/gold/silver spots?