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Ron Hutt
New member
Username: Ron
Post Number: 9
Registered: 12-2006
Posted From: 12.213.224.36
Rating: 
Votes: 1 (Vote!) | | Posted on Monday, January 15, 2007 - 11:26 pm: | 
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I have a 2001 Conquest. I intend on running the machine at altitudes of 4500 feet to 7000 feet. Do I need to jet the carbs. differently? Will it hurt the machine if it runs too rich? |
Rogersmith
Advanced Member
Username: Rogersmith
Post Number: 200
Registered: 01-2005
Posted From: 70.234.130.203
Rating:
Votes: 1 (Vote!) | | Posted on Tuesday, January 16, 2007 - 11:20 am: |
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I'd re jet it. It'll run lousy and load up if you have a sea level jet in it. I have no experience with the conquest carb but a 'net search brought up a FD620D kawasaki manual. Not sure if that's the right specs but will give you an idea. Jet # is stamped on the face. Replace main jet and lean out the idle screw.
sea level to 3000ft jet# 112 standard
3000 to 6000 jet# 110
6000 > jet# 108
http://www.smallenginewarehouse.com/images/manuals/FD620_Service_Manual.pdf |
Ron Hutt
Junior Member
Username: Ron
Post Number: 10
Registered: 12-2006
Posted From: 12.213.224.59
Rating: N/A
Votes: 0 (Vote!) | | Posted on Tuesday, January 16, 2007 - 11:38 am: |
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Thanks Rodger. I would guess also that I could get away with running the machine with the #110 at a little higher altitude than 6000 feet except for Boise, it is at 2850 feet. I would probably have to change back to the #112. |
Fred Sowerwine, Montana's Max dealer
Advanced Member
Username: Fred4dot
Post Number: 225
Registered: 01-2005
Posted From: 216.166.168.53
Rating: N/A
Votes: 0 (Vote!) | | Posted on Tuesday, January 16, 2007 - 11:59 am: |
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You might look into the dial a jet. I don't know a thing about them but it sounds good.
http://www.thunderproducts.com/dial_a_jet.htm |
Ron Hutt
Junior Member
Username: Ron
Post Number: 11
Registered: 12-2006
Posted From: 12.213.224.39
Rating: N/A
Votes: 0 (Vote!) | | Posted on Tuesday, January 16, 2007 - 09:25 pm: |
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Jets and dial-a-jet. I looked at both. I am going to call the supplier of the dial-a-jet. It does not appear that there is one for the FD620D but I'm going to ask.
Rodger, I checked the site that you sent me and they say you have to completely remove the carb. to re-jet. Next time up I am going to see if I can just remove the fuel selenoid and rejet it.
Fred where in Montana are you?
Ron |
Fred Sowerwine, Montana's Max dealer
Advanced Member
Username: Fred4dot
Post Number: 227
Registered: 01-2005
Posted From: 216.166.168.53
Rating: N/A
Votes: 0 (Vote!) | | Posted on Wednesday, January 17, 2007 - 01:34 am: |
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Ron, I'm in Belgrade (Gallatin Valley). I mostly have used the Briggs 18 HP with the standard jets. I have run from sea level up to about 7200. Here at home, I am from about 3800 to about 6000. I always get the high altitude jet with a new machine and give them to the owner. I'm only aware of one installing it and he said it didn't seem to make much difference (he is around 5500). At 6000 I don't notice any drop in power, I do at 7200, but it is still Ok for what I do.
If you get a dial a jet, be sure and let us know how it works for you. The only person on here that has one is a fellow in Michigan, I think; (Big Wolf AKA Gary Hargis) installed on his 2004 Max IV 950T with the Kawasaki engine. We never really got a report on how well it worked long term.
He hasn't been on the board for quite some time now. |
Ron Hutt
Junior Member
Username: Ron
Post Number: 12
Registered: 12-2006
Posted From: 12.213.224.38
Rating: N/A
Votes: 0 (Vote!) | | Posted on Wednesday, January 17, 2007 - 10:44 am: |
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I checked the site that sells the dial-a-jet and it can be used with the Kawasaki engine. They also sell a TPI device that appears to be easy to install on the air filter chamber for additional flow if necessary. The price is $84.50 for the dial-a-jet and $19.95 for the TPI.
He asked me some questions I could not answer because my machne was not in front of me. Does the Kawasaki air filter housing have a rubber connecting hose(collar) going into the Carb. housing?
If so the dial-a-jet can be fitted fairly easy. He said it was a 45 minute project. He also said you want to put the smallest jet in (6000ft one) #108 and use the new system to adjust gas and air flow.
Can these engines be damaged by low gas flow at low altitudes? He said that they would not be damaged but would perform poorly. What do you all think? |
Ron Hutt
Junior Member
Username: Ron
Post Number: 13
Registered: 12-2006
Posted From: 12.213.224.38
Rating: N/A
Votes: 0 (Vote!) | | Posted on Wednesday, January 17, 2007 - 02:14 pm: |
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I was driving around today thinking that the lowest altitude I will be driving the machine at is 2850 ft. I might just put the 3000 to 6000 jet in #110 and accept what ever the loss in performance may be above 6000 ft. |
Rogersmith
Advanced Member
Username: Rogersmith
Post Number: 201
Registered: 01-2005
Posted From: 64.149.48.149
Rating: N/A
Votes: 0 (Vote!) | | Posted on Wednesday, January 17, 2007 - 02:43 pm: |
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Well lean can be bad esp hot weather/high loads..
Sounds like the dial a jet leaves the tuning up to you. I hadn't seen the site till now. An unusual product, without seeing it I'd guessed it was an adjustable main jet needle, but it adds another fuel circuit of it's own.
Fred's post reminds me how lean the engines are to start with these days because of emmission standards. Just barely rich enough to run. So with a 112 jet, going up a notch in elevation might not be bad at all, and two notches might be acceptably rich. You can compensate a lot with the idle screw if it loads up at idle.
You might try it at 7000, if the exhaust blows sooty buy the intermediate jet and call it good.
Or get the dial a jet and give us a review.
I guess 7000 isn't too bad; when I was up at 10 or 12000 feet in a carbureted engine with a low alt jet, that was a sooty rich tailpipe. |
Ron Hutt
Junior Member
Username: Ron
Post Number: 14
Registered: 12-2006
Posted From: 12.213.224.57
Rating: N/A
Votes: 0 (Vote!) | | Posted on Wednesday, January 17, 2007 - 04:42 pm: |
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Yeh Rodger the Dial a jet looks interesting but I was thinking that once it is set would one have to mess with it again just like a jet. The guy I talked to at this site was very up on the engines out there and made it sound very easy to install. Might be a good idea for you at 10 to 12 thousand feet. There is an item called a TPI you should look at also for better air flow at the same site. You should carry a little oxygen at that altitude!! I ordered a #110 jet and will get it in and let you know if there is any difference.
I also drove Avenger today just to see if there was that much difference between my Conquest. It may be the only one in Idaho. My comments for what they are worth.
1. It has a lot of power and sounds great
2. I like the new handle bar and brake set up.
3. It gave a very rough ride with the tracks. stiffer sidewalls??
4. Sits much higher: good and bad.
5. No poping, chain noise at all
6. It is a lot of money!! |
Shop Talk: Tech Tips and Q&A section