Import front master cylinder questions

[Kayla]

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.

[youngy]

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.

[slow codger]

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

[ekoja]

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.

[idl1975]

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.

[Kayla]

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.

[idl1975]

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*

[Kayla]

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

[slow codger]

But then would you have bought the TRX?

Dave E

[Kayla]

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.

[slow codger]

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

[youngy]

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

[haggisbash]

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

[phuk72]

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)

[Kayla]

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?