KTM Carb Heater Install

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cedric
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Re: KTM Carb Heater Install

Postby cedric » Thu Oct 12, 2017 1:54 pm

thirtyseven wrote:When I get a 2 stroke I'm going to use up my supply of depends well meaning friends gave me. Just insert a warm rock and wrap that sucker around the carb.


How's this setup working for you 37? Do you need more Depends? Christmas is coming up....

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thirtyseven
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Re: KTM Carb Heater Install

Postby thirtyseven » Thu Oct 12, 2017 3:05 pm

cedric wrote:
thirtyseven wrote:When I get a 2 stroke I'm going to use up my supply of depends well meaning friends gave me. Just insert a warm rock and wrap that sucker around the carb.


How's this setup working for you 37? Do you need more Depends? Christmas is coming up....

I'm still trying to figure out the jetting thing. Gonna move on to the depends after I get the mikuni sorted.
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trailguy
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Re: KTM Carb Heater Install

Postby trailguy » Thu Oct 12, 2017 6:30 pm

thirtyseven wrote:
cedric wrote:
thirtyseven wrote:When I get a 2 stroke I'm going to use up my supply of depends well meaning friends gave me. Just insert a warm rock and wrap that sucker around the carb.


How's this setup working for you 37? Do you need more Depends? Christmas is coming up....

I'm still trying to figure out the jetting thing. Gonna move on to the depends after I get the mikuni sorted.

Why on earth did you leave the flawless running EFI three seven :eek:
A couple of things sorting the Mikuni.
1] Warm up your pitching arm really well.
2] Remove Mikuni from the bike.
3] Standing on a shore line, chuck the Mikuni into the the center of the lake as hard as you can.
4] Bolt on short body Keihin.
Mikuni sorted and this gets you onto the Depends project ASAP.

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thirtyseven
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Re: KTM Carb Heater Install

Postby thirtyseven » Fri Oct 13, 2017 12:45 pm

Ok. Got it!
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Re: KTM Carb Heater Install

Postby Dobi » Fri Nov 17, 2017 6:01 pm

Thanks for the pics and notes for install DB. I just picked mine up from Allison @ Cycleworks and need to get to work on it. Was the wiring plug and play just like the old one?

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Re: KTM Carb Heater Install

Postby dirtyboy » Sun Nov 19, 2017 7:36 pm

Dobi wrote:Thanks for the pics and notes for install DB. I just picked mine up from Allison @ Cycleworks and need to get to work on it. Was the wiring plug and play just like the old one?


Hey, I just installed a new set of grip heaters on my KTM 250XC. Works awesome. As for the carb heater, yes it's plug and play. I think that the wiring harness is the same as the older <2017 models.

I wondered if the carb heater was low on watts when I had my grip heaters on high today. Lot's of snow hitting the carb. I turned the grip heaters to low and the over-richness of the carb went away. Not positive on that but I think the carb heater is a requirement although one of the riders today didn't have one on his 2017 250XC and he didn't have much trouble.

My advice is to drill the hole as far to the outside of the carb as possible and no issues with the hole and a couple washers to space the heater element.

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Re: KTM Carb Heater Install

Postby GKRContracting » Sat Dec 09, 2017 12:19 am

Bringing back an old thread. I want to install a KTM carb heater element in a Keihin FCR carb but not clear on where it goes because the obvious hole is already too large an I.D. for the thread size of the element. I could drill and tap what's left at the bottom of the hole but very little material left there. What gives?
I could put a helicoil in and that would likely work well but am I missing something?
Here's a pic of where I assume it goes.
Attachments
IMG_4321.PNG
IMG_4322.PNG

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Re: KTM Carb Heater Install

Postby malcolmzilla » Sat Dec 09, 2017 4:17 pm

Is there a flat landing cast in the other side of the Venturi? Post a pic. Just did mine, albeit a CV Kehin (pinger).
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Re: KTM Carb Heater Install

Postby GKRContracting » Sun Dec 10, 2017 12:30 pm

No, nothing suitable on the other side. Here is a pic. The small boss you see there is too small, thread size of the heater element is larger than the OD of that boss.
IMG_4327.JPG

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malcolmzilla
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Re: KTM Carb Heater Install

Postby malcolmzilla » Sun Dec 10, 2017 8:47 pm

Hmm. I’m stumped. I’d reckon the boss in your 1st set of pictures is the best location. If you’re comfortable helicoil, otherwise maybe drill and tap some brass or aluminum stock that fits in there and epoxy; I think the heat transfer aspect is the key. I never had issues on my exc 530 or wr450 in the winter though. Maybe that nice big hot cylinder in front of it throws enough btus around!
Last edited by malcolmzilla on Mon Dec 11, 2017 11:43 am, edited 1 time in total.
15 Yamaha YZ250FX, 270cc, cams
15 XC250
11 Berg 570, dualsport and supermoto
17 PW50
78ish CT70
Just another Dirt Donkey...

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Re: KTM Carb Heater Install

Postby GKRContracting » Sun Dec 10, 2017 9:37 pm

Well I think the helicoil is be best route as it will promote the best heat transfer. Thanks for your input, I'll post up some pics of the completed install.

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Re: KTM Carb Heater Install

Postby axel99 » Mon Dec 11, 2017 4:52 pm

Never need heat on a 4t carb. If it's a snow bike maybe that's a different story. Others here have a lot of experience with snowbike setup. Wast of time for single track winter riding above -15c.
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Dakota_c69
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Re: KTM Carb Heater Install

Postby Dakota_c69 » Mon Dec 11, 2017 6:53 pm

axel99 wrote:Never need heat on a 4t carb.


...or Betas!
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Re: KTM Carb Heater Install

Postby GKRContracting » Tue Dec 12, 2017 9:35 am

Yes it's for a Snowbike. Here is the helicoil results.
IMG_4348.JPG
IMG_4349.JPG
IMG_4356.PNG
IMG_4357.PNG

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malcolmzilla
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Re: KTM Carb Heater Install

Postby malcolmzilla » Tue Dec 12, 2017 1:32 pm

Yowsers! Well that oughta get the heat right into it! :D I thought you were simply helicoiling into the existing blind casting hole.

I will try to snap a pic later, but on the CV carb (2T), it doesn't tap thru to the venturi, rather into a casting off the side and the heat (theoretically) transfers.
15 Yamaha YZ250FX, 270cc, cams
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11 Berg 570, dualsport and supermoto
17 PW50
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