trx rev limiter

oka · Post by **oka** » Tue May 08, 2007 8:21 am

same problem as peter brisbane Japanese import , 185 km top speed . 7000rpm max . help free this sluggish trx . any feedback welcome

Quan-Time · Post by **Quan-Time** » Tue May 08, 2007 8:32 am

use the search function.. been done many times before

Greg · Post by **Greg** » Tue May 08, 2007 8:54 am

Hi there Oka...

Try here:

http://trx850.myfreebb.com/viewtopic.ph ... hlight=tps

This thread is from the old board and gives a pretty good schematic and a pictorial methodology (great word eh?) on how it's done...

It works !!

Greg

Killerwhale · Post by **Killerwhale** » Tue May 08, 2007 9:24 am

oka wrote:same problem as peter brisbane Japanese import , 185 km top speed . 7000rpm max . help free this sluggish trx . any feedback welcome

There is a link in here to an ebay item wich fixes this...someone in here bought it and reported it to work just fine.
(perhaps easier than the do it yourself solution!?)

slow codger · Post by **slow codger** » Tue May 08, 2007 8:08 pm

I bought the little red box made by POSH-FIRM of Japan, plugs into the wiring loom from the clocks. This is for the XJR 1200 or the TRX, however went on their website, and it isnt shown.
Your bike will rev to 7000 revs, and top out at 180 KPH, less RPM with aftermarket cans on etc.
It is easy to fit, just need to remove the fairing.

Dave E.

Sarg · Post by **Sarg** » Sun May 13, 2007 10:14 am

Hi Oka,

Good to see another Kiwi on line.

I have the same challenge and tried dicking withit by fitting other speedos and all sorts. No luck.

I rcommend having a look around for the plug in option. Everyone says that it works, and is simple and easy.

Sarg

oka · Post by **oka** » Tue May 15, 2007 1:58 am

hi sarglived in brissy for 3 yearsleft in o5 , got my hands on a 4unecu unit, hope this does the trick, miss that qld weather

marty · Post by **marty** » Tue May 15, 2007 1:43 pm

try this link. It has a review on the rex and also a paragraph on how to disconnect the limiter.

http://www.mcroadrunner.com.au/stunts/trx_aussie.htm

slow codger · Post by **slow codger** » Fri May 25, 2007 8:35 pm

The little red box does the trick, now revs off the scale, not tried for top end yet.

Dave E

[JP] · Post by **[JP]** » Tue May 29, 2007 7:41 pm

well..was just reading this, is 185kph the normal top speed of the TRX?

cause the other day I pushed mine a bit..and bear in mind I donÃƒâ€šÃ‚Â´t have a clue what mods the bike has internally as it was an ex-Harris bike..

But she went quite quickly up to 140mph (about 225kph) and was still going when I had to break....
donÃƒâ€šÃ‚Â´t ask me about what revs cause at that speed I just looked at the speed when I started to break...

HolerTogni · Post by **HolerTogni** » Tue May 29, 2007 10:01 pm

Hi [JP]!

The maximum speed according to German registration documents is 215 km/h.

Mine does approx. 220 km/h at 8.000 rpm with a transmission ratio of 17/42 (shorter than the original 17/39).

This might be "true" 200 km/h with an estimated 10% fast reading of the speedo - and that's enough for me 'cause I prefer greater acceleration than top speed.

Quickening greetings from Munich!

Killerwhale · Post by **Killerwhale** » Wed May 30, 2007 6:48 am

[JP] wrote:well..was just reading this, is 185kph the normal top speed of the TRX?

Out in traffic the speedo shows 210kmh -ish
On the dyno itÃƒâ€šÃ‚Â´s 180kmh -ish
....so the speedometer is a really happy one on the TRX it seems!

dfh · Post by **dfh** » Wed May 30, 2007 8:12 am

Killerwhale wrote:
[JP] wrote:well..was just reading this, is 185kph the normal top speed of the TRX?
Out in traffic the speedo shows 210kmh -ish
On the dyno itÃƒâ€šÃ‚Â´s 180kmh -ish
....so the speedometer is a really happy one on the TRX it seems!

replace the 120/60 front tyre with a 120/70 and bugger me backward the speedo becomes accurate...

DFH

youngy · Post by **youngy** » Wed May 30, 2007 10:34 am

[JP] wrote:well..was just reading this, is 185kph the normal top speed of the TRX?

cause the other day I pushed mine a bit..and bear in mind I donÃƒâ€šÃ‚Â´t have a clue what mods the bike has internally as it was an ex-Harris bike..

But she went quite quickly up to 140mph (about 225kph) and was still going when I had to break....
donÃƒâ€šÃ‚Â´t ask me about what revs cause at that speed I just looked at the speed when I started to break...

Only for restricted Japanese imports. UK spec bikes (like yours) are not restricted.

slow codger · Post by **slow codger** » Wed May 30, 2007 11:04 am

If its restricted you will know when you hit the limiter, believe it cuts out onto one pot, certainly won't go any faster, or rev any higher.

Dave E

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