Sportfire Performance Questions

Technical topics related to machines powered by Kasasaki motors
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Mr. Deere
Posts: 3073
Joined: Fri Oct 20, 2006 12:00 am
Location: Rutland, MA

Sportfire Performance Questions

Post by Mr. Deere »

Hi I was wondering if there is anyway to get a little more punch out of my little Sporty. I have the helix wound at hole 3 or 4 I think. I was just wondering if anyone had any good Clutch combinations to really give this thing some more nut! Most of my problem I've found is with traction. I may play with studs if I can find another track. This ones in nice shape. Also any gearing or jetting ideas? Thanks.
BOB From MASS
OWN: 1 1983 JOHN DEERE LIQUIFIRE 440
1 1973 JOHN DEERE JDX8 440
1 1982 JOHN DEERE SPORTFIRE 440
1 2000 SKIDOO MXZ 600
GOTTA LOVE THAT TWO STROKE SMELL
JDRIDER
Posts: 44
Joined: Sun Sep 16, 2012 9:34 pm
Location: Columbia City, IN

Re: Sportfire Performance Questions

Post by JDRIDER »

I've got a liquifire carb on mine, and it's got plenty of nuts I just can't get traction like you stated
1980 Sportfire 440
1980 Trailfire 440
1980 Trailfire 340 with backrest (436 original miles) SOLD
(2) 1978 Cyclone 440
1978 liquifire 440 (restoration in progress)
1976 liquifire 440
1983 sprintfire 340 SOLD
Mr. Deere
Posts: 3073
Joined: Fri Oct 20, 2006 12:00 am
Location: Rutland, MA

Re: Sportfire Performance Questions

Post by Mr. Deere »

Really? How do you Jet it? Was it a noticeable increase? Its a VM36 As opposed to a 34 right?
BOB From MASS
OWN: 1 1983 JOHN DEERE LIQUIFIRE 440
1 1973 JOHN DEERE JDX8 440
1 1982 JOHN DEERE SPORTFIRE 440
1 2000 SKIDOO MXZ 600
GOTTA LOVE THAT TWO STROKE SMELL
nhjdfire440
Posts: 13
Joined: Thu Sep 29, 2011 9:24 pm
Location: New Hampshire

Re: Sportfire Performance Questions

Post by nhjdfire440 »

yeah, for me too the problem with most of the JDs is traction. For this reason I have not had to hunt for much more power. You have to remeber that the tracks on these sleds don't have the biggest "bite" in the snow.
Matt
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Real Name: Matt
Location: Coopersburg, PA
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Re: Sportfire Performance Questions

Post by Matt »

Studs & carbides make a big difference, but Bob, if you have a good running sled, DON'T MESS WITH IT. If you want performance, work on the Liquifire while riding the Sport!
:usa: Matt - JDsleds.com Administrator
JDT
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Joined: Wed Nov 21, 2007 1:00 am
Real Name: Todd
Location: Milbank South Dakota

Re: Sportfire Performance Questions

Post by JDT »

Can I second that?
Todd Schrupp

Milbank SD
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WinnipegStPaul9
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Joined: Sat Jul 23, 2005 12:00 am
Real Name: Don Amber
Location: Churubusco, IN

Re: Sportfire Performance Questions

Post by WinnipegStPaul9 »

Can I third that?
Feel free to check out our website www.buscobullet.com for restorations or parts.
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jdrob
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Real Name: Rob
Location: Pennsylvania/OHIO border

Re: Sportfire Performance Questions

Post by jdrob »

I warned him ! There would be a 1 legged A$$ kicking going on if he messes with that engine ! :lol22: You wanna go fast buy a NEW sled....
Jdrob



"Two things are infinite: the universe and human stupidity; and I'm not sure about the universe." AE
Mr. Deere
Posts: 3073
Joined: Fri Oct 20, 2006 12:00 am
Location: Rutland, MA

Re: Sportfire Performance Questions

Post by Mr. Deere »

I'd never mess Witt the engine! Hahaha I was afraid that was the answer I was gonna get. Ohh well it's fun for what it is. Def want to fix the Liq!
BOB From MASS
OWN: 1 1983 JOHN DEERE LIQUIFIRE 440
1 1973 JOHN DEERE JDX8 440
1 1982 JOHN DEERE SPORTFIRE 440
1 2000 SKIDOO MXZ 600
GOTTA LOVE THAT TWO STROKE SMELL
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