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Carburated KTM guys ,,,questions

KAWGRN

Well-known member
Premium Member
I am thinking of adding a KTM 520 with big bore motor, is the carburation easy to dial in for 8-12k or does it flame out? Looking at another 570 berg or this KTM to add to the stable of mavericks!
 
Oddly enough mine sputters at around 4000-6000 ft and seems really strong again above that and below that. I have an 09 300 XCW and haven't touched the jetting since I bought it. I've only taken mine to 8000 ft though. JC
 
Thats why I have been using the FI bergs but they are top heavy,was looking for a lower CG I also have an 09 -300 and was thinking about using it also! But love that thing in the dirt,didnt want to hurt the 3 honey! Found a clean 09- 530xc! I have decided I must have the E button but carburation I can fix.
 
I rode my 08 KTM 450 20 days+ this season in a real variety of conditions and by and large it didn't miss a beat. To be honest I was blown away how well it worked. I think a guy could get a couple of more hp if the jetting was always perfect but I wouldn't be scared of the carb, sure an FI bike would be nice but there is other stuff I would personally spend my money on first. JMO

M5
 
The two biggest things I did were to retrofit a KTM carb heater to the 450 and I built an snorkle system, I never even tried the Timbersled intake/filter. I think those two mods eliminated 90% of the carb issues. It worked in the cold, in the dry pow type snow and when it got warm out, it just plain worked. I also put my thermostat back on for winter.

M5
 
Last edited:
Ive never had Any issues with a carb.
I run a pod filter with a skin, no heater, bike always runs great.
Maybe we are lucky here in wa to have relatively warm conditions.
Its usually never below 20
 
Oddly enough mine sputters at around 4000-6000 ft and seems really strong again above that and below that. I have an 09 300 XCW and haven't touched the jetting since I bought it. I've only taken mine to 8000 ft though. JC

How does the 300 compare to the 4 strokes?
 
Seems to get along just fine. I tried it back to back with a 530, same year and I really like the nimble feeling mine has over a 530. I will also say that mine seems to be able to go everywhere one of them go but need to generally spin more to do it. But just like on dirt, I find the 300 more fun even if it doesn't climb quite as well. It also uses more gas but never used up my spare carboy. The 300 also has a terrible e-starter compared to the fours. My buddy also compared mine to a 690 and the 690 just pulls through everything no problem. But the 690 seems more 'automotive' in construction making it less durable than the 530 or 300 (we broke a lot of stuff on it in 3 days whereas as we broke nothing on the other bikes). Surprisingly the 690 was also fairly nimble but hard to get unstuck when you buried it. I ran the 300 last year to see if I wanted to upgrade to a four stroke this year and I don't think I will. If I do, it will only be because I want a second bike dedicated for snow biking and then would go FI 450 estart MX bike. I'd just run studs on the 300 for fall/spring and tires for summer as I don't like that I have to go only to the big mountains instead of a local icy trail due to having only the one bike. But if I can only have one bike, I will keep the 300 as I wouldn't want to give it up for summer just for the sake of the slight improvement in snow biking climbing ability. In fact, I prefer the trees anyway and the 300 is more fun in the glades IMO. JC
 
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