Joined Mar 2009
1K Posts | 251+
Portugal
Hi
From the start until 97/98 you had round slide and flat slide ones.
I believe that the flat slide was only for the 350 and 400 ones, I have one flat on a 400-97, that I think was the last year of the flat slide ones.
The 600 I believe it was always round slide and it was a 40. My 98 is.
ZAGA
From the start until 97/98 you had round slide and flat slide ones.
I believe that the flat slide was only for the 350 and 400 ones, I have one flat on a 400-97, that I think was the last year of the flat slide ones.
The 600 I believe it was always round slide and it was a 40. My 98 is.
ZAGA
Joined May 2015
61 Posts | 8+
Scotland
Hi
From the start until 97/98 you had round slide and flat slide ones.
I believe that the flat slide was only for the 350 and 400 ones, I have one flat on a 400-97, that I think was the last year of the flat slide ones.
The 600 I believe it was always round slide and it was a 40. My 98 is.
ZAGA
Cheers zaga am Gona change it to a 41 mm pumper flat slide as just think Ian loosing top end power with the 38 mm
Joined Nov 2001
17K Posts | 774+
Ely, England
you won't be doing it for the power at the top end.
you've got ports and valves like squirrels ears.
that is how it was done then....
regards
Taffy
Joined Nov 2001
17K Posts | 774+
Ely, England
no, that isn't what I said. I said that you won't be doing it for more top end. the ports are a bigger restriction than the carb.
none of us put these carbs on for 'more power', we do it because it is a better carb, a smoother carb. the bikes start and respond better. they don't wear out.
but nobody ever came on here and said; "i gained 5mph". it isn't going to happen.
if the road riders don't rid at the top end then we dirty boys defo don't.
regards
Taffy
none of us put these carbs on for 'more power', we do it because it is a better carb, a smoother carb. the bikes start and respond better. they don't wear out.
but nobody ever came on here and said; "i gained 5mph". it isn't going to happen.
if the road riders don't rid at the top end then we dirty boys defo don't.
regards
Taffy
Joined May 2015
61 Posts | 8+
Scotland
yeah I here ya buddy am not looking for loads of hp but just want the bike to run strong as love the power it has just think it's not fuelling as good at the top as it the plug never gets dark it's always on light side and exhaust gets hot so thinking its lean ?
Joined Nov 2001
17K Posts | 774+
Ely, England
just renew everything in it. trouble is, the 400 jetting is different to the 600 jetting. you'd probably have better luck using Husky data!
if changing, just get a 37 or better still a 39mm FCR Keihin MX carb. they were standard on all KTM EXCs during 2004-2005.
there are loads of dell ortos about. I have a dozen here. 38mm or 40mm they all do a reasonably good job.
regards
Taffy
if changing, just get a 37 or better still a 39mm FCR Keihin MX carb. they were standard on all KTM EXCs during 2004-2005.
there are loads of dell ortos about. I have a dozen here. 38mm or 40mm they all do a reasonably good job.
regards
Taffy
Joined Nov 2001
17K Posts | 774+
Ely, England
well you want to buy it complete with the throttle tube and the push/pull cables that is the first thing.
you can use the old inlet rubber and trim 5mm off it so it becomes a single rubber lip attachment instead of two-lip. the AFA on the back will have to be around 66-68mm and that you'll see when you get the carb.
I sell the alloy AFAs, at about 40gbp each. as for jetting, any eruropean FCR should be a straight bolt on while the Jap jetting will be wrong but just about start-able and even ride-able.
remember the carbs choke and hot start knobs are high up the side. any kind of droopy fuel tanks means you aren't going to reach the buttons!
regards
Taffy
you can use the old inlet rubber and trim 5mm off it so it becomes a single rubber lip attachment instead of two-lip. the AFA on the back will have to be around 66-68mm and that you'll see when you get the carb.
I sell the alloy AFAs, at about 40gbp each. as for jetting, any eruropean FCR should be a straight bolt on while the Jap jetting will be wrong but just about start-able and even ride-able.
remember the carbs choke and hot start knobs are high up the side. any kind of droopy fuel tanks means you aren't going to reach the buttons!
regards
Taffy
carb schmarb
You won't go wrong taking Taffy's advice, but FWIW I've been running the PHM 40 on my '98 Fx600 and never had a carb problem at any speed/RPM. It starts great, idles fine, responds well, and as far as top end is concerned I doubt that you have sustained high speed areas like we have here in the Nevada desert areas and the PHM shines at high revs. Even though the FCP is indeed a more civilized modern carb I stand by the PHM with a dial-a-jet.
But I'm just an over-the-hill desert racer so you will almost certainly be better served to listen to Taffy and Ned.
You won't go wrong taking Taffy's advice, but FWIW I've been running the PHM 40 on my '98 Fx600 and never had a carb problem at any speed/RPM. It starts great, idles fine, responds well, and as far as top end is concerned I doubt that you have sustained high speed areas like we have here in the Nevada desert areas and the PHM shines at high revs. Even though the FCP is indeed a more civilized modern carb I stand by the PHM with a dial-a-jet.
But I'm just an over-the-hill desert racer so you will almost certainly be better served to listen to Taffy and Ned.
Joined Nov 2001
17K Posts | 774+
Ely, England
hey Dez
don't you denegrate yourself like that, no.....you can leave Ned and i to do that! LOL!!!!
Taffy
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