proved the pro jet kit does not work on a 99 trx,[$450 on dyn0]
from reading the post do i look for a tdm 99 emulsion tube and 147 needle as per killerwhales suggestion.
CARB IDENTIFICATION
Moderators: trixynut, Mincehead, dicky, phuk72, Jak, Kevtrx849
-
craybait
- TRX-Enthusiast
- Posts: 107
- Joined: Wed Dec 29, 2010 12:15 pm
- Location: perth w.a.
-
dandywarhol
- Site Sponsor
- Posts: 1639
- Joined: Fri Nov 24, 2006 12:56 pm
- Location: Edinburgh, Scotland
Re: CARB IDENTIFICATION
The emulsion tube is not a replaceable part on post '98 TDM
1996 TRX 850, blue, Ohlins 46HRCLS, Race Tech Gold Valves, 0.90 springs, Venom pipes, R6 brakes............
1974 Yamaha RD250A, Candy Blue
1998 Yamaha SZR660, blue of course
1967 Yamaha TD1C 250, Blue and white
1974 Yamaha RD250A, Candy Blue
1998 Yamaha SZR660, blue of course
1967 Yamaha TD1C 250, Blue and white
-
craybait
- TRX-Enthusiast
- Posts: 107
- Joined: Wed Dec 29, 2010 12:15 pm
- Location: perth w.a.
Re: CARB IDENTIFICATION
Think i will go with 2 $45 carb rebuild kits and see if that sorts it.
-
Tarwetijger
- TRX-Enthusiast
- Posts: 1537
- Joined: Tue May 15, 2007 9:31 am
- Location: Netherlands, Assen
- Contact:
Re: CARB IDENTIFICATION
For those who are interested.
I have 3 sets of carbs laying around
and just took a look for the differences. They all are 38mm. 
Two are the same, with more or less similair codes on it: 4UN00 K5Y3 & 4UN00 T581
Both use #75 starterjet and #142,5 mainjet. The pilot jets wouldn't come off, so I don't know that one.
The third set if from a Japanese bike and has a different code: 4NX00 F4 S4X1.
It has accelerator pump nozzles and a (sort of) button on the floater chamber. Also the connection tube between the floater chambers is different than the one on the EU/UK spec carbs. See pic below.
The starterjet is #75 again but mainjet #146. Although the bike it came off ran with a drilled airbox, so maybe it has been set up for that use. I haven't tried the pilot jet.
So sadly no 40mm '99 TDM carbs in my shed
But is the Japanese set any better than the EU/UK spec? Or is it just different...
I can imagine it is different because of environmental rules.
I have 3 sets of carbs laying around
and just took a look for the differences. They all are 38mm. Two are the same, with more or less similair codes on it: 4UN00 K5Y3 & 4UN00 T581
Both use #75 starterjet and #142,5 mainjet. The pilot jets wouldn't come off, so I don't know that one.
The third set if from a Japanese bike and has a different code: 4NX00 F4 S4X1.
It has accelerator pump nozzles and a (sort of) button on the floater chamber. Also the connection tube between the floater chambers is different than the one on the EU/UK spec carbs. See pic below.
The starterjet is #75 again but mainjet #146. Although the bike it came off ran with a drilled airbox, so maybe it has been set up for that use. I haven't tried the pilot jet.
So sadly no 40mm '99 TDM carbs in my shed
But is the Japanese set any better than the EU/UK spec? Or is it just different...
I can imagine it is different because of environmental rules.
-
cobbadiggabuddyblooo
- Site Sponsor
- Posts: 6809
- Joined: Thu Aug 28, 2008 9:19 am
- Location: Brisbane,Australia
Re: CARB IDENTIFICATION
Something to be mindful of and wasn't aware of any difference.
Did a spare parts check here in Oz and looks like all carbies are the same 38mm on the trx's. (96-99)
The TPS is the same on all Oz model TRX's too and interchangeable with later model XJR's 12/1300's and XJ900's
But search on the TDM 850 shows a carby change from 99 to 02 and they run their own designated TPS.
So just double check the intake spigot length if you choose to fit the later model 40mm TDM carbies to your TRX.
Remember too the fcr's for a TRX need 7mm longer intake spigots than the TDM's to get around the Acc pump position and oil filler pipe.
It may not be an issue with the larger CV carb's but best to be safe than sorry.
Did a spare parts check here in Oz and looks like all carbies are the same 38mm on the trx's. (96-99)
The TPS is the same on all Oz model TRX's too and interchangeable with later model XJR's 12/1300's and XJ900's
But search on the TDM 850 shows a carby change from 99 to 02 and they run their own designated TPS.
So just double check the intake spigot length if you choose to fit the later model 40mm TDM carbies to your TRX.
Remember too the fcr's for a TRX need 7mm longer intake spigots than the TDM's to get around the Acc pump position and oil filler pipe.
It may not be an issue with the larger CV carb's but best to be safe than sorry.
laughter is the best medicine