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Posted by: homer
I have a 1999 300. I put a K&N filter kit and jet kit in it. Then my mechanic put a super trapp pipe on it and jetted it for this pipe. I didn't want a loud pipe, and this one is not to bad depending on how many disks you run in it. He had to make an adapter to bolt the pipe on as no one makes one to bolt up to the 300. The pipe seemed to make a good deal of difference bottom to mid. Hope this helps.
Posted by: homer
Johnycat, Another thing you can do is cut out some of the plastic in the air filter cover and add some sort of filter there. I don't ride in the water so this works for me. I bought an extra cover so incase I have to get into some deeper water all I have to do is change the cover out. I know everyone's terrain is different, but I put a moose lift kit on mine, really helps on rocky trails. By the way I have a AC 650 and my wife has a AC 375 and I will take my 300 in the more dangerous places, it is that much more stable.
Posted by: Volvoman
Johnycat,I feel the same about CV carbs as you do. I have changed them out for straight Mukunis on several dirt bikes I have had over the years with great success. I was looking for the same thing as you are,better response ect. Im sure it will work on the Cat also, but I havent had the time to spend on it yet. I have had to rejet the Keanes that are on my wifes and mine 2001 300s. I am useing 130 main jets and am running the pilot screw 3.5 turns out. It is a fact that AC changes carb. types alot. My dealer tells me that I will need to go with a 125 main jet when we go to Co. next summer. I also understand that the big bore kit for the older King Quad will work on the AC. But I think the carb swap is a better bet.
Posted by: Volvoman
I used the Moose lift kit on mine and like it. I was looking for more ground clearance when going down long rocky down hills in the front end and this really helped. I also like the idea of haveing same tires on both units. Going to bigger tires opens up some problems with CV jionts on the bigger ACs. It may not be a problem with the smaller engine of the 300, but there is much less power to turn them with. Try the lift kit first, it may be all you need. The 300 is in some ways like the old VW, a very well balanced package and when you change one thing it affects others.
Posted by: Volvoman
The older 300s (mine are 2001s) still used the Susukie (Spell) front end and you chould make a longer shift lever for it,as it already had the lock feature in the diferential. Im not sure when it changed. Basically if you have a silver dif. you can change it but if you have a black one you can not. I know all 2001s were silver and the 2003s were black. Not sure about 2002s.
Posted by: Bear4570
Depends on what year your rigs are as to the availablity of pep up parts. AC likes to change carbs alot.
Posted by: Bear4570
Ok A Dynojet is you best bet along with a K&N air filter;
http://www.dynojet.com/jetkits/atvarcticjets.shtml
http://www.knfilterchargers.com/search/appsearch.aspx
Other than these two you could go with a pipe like homer says, but it ain't cheap. The are no ignition boxes so this is about it. Soon I will be doing the jet kit and air filter for my '05 400, but with only 400 miles, it is hardly broken in. With the wife now rding the 250 I have been informed that screwing around with it puts my life in danger.
Posted by: Bear4570
Johnnycat; If you really want to get crazy you could pull the head, port it and shave it to up the compression so you will need to run premium gas and put a bigger carb on it like off a 400. All of the afore mentioned would rob you of low end torque, but your low range and super low should cover up that. But trail riding would be a bit more difficult. To me though the use of regular gas and and trail riding ability is why I have a ute quad. If I want a lot of go fast Iwill get a Scrambler or Raptor.
Posted by: Bear4570
Quote
Originally posted by: Volvoman
Johnycat,I feel the same about CV carbs as you do. I have changed them out for straight Mukunis on several dirt bikes I have had over the years with great success. I was looking for the same thing as you are,better response ect. Im sure it will work on the Cat also, but I havent had the time to spend on it yet. I have had to rejet the Keanes that on one my wifes and mine 2001 300s. I am useing 130 main jets and am running the pilot screw 3.5 turns out. It is a fact that AC changes carb. types alot. My dealer tells me that I will need to go with a 125 main jet when we go to Co. next summer. I also understand that the big bore kit for the older King Quad will work on the AC. But I think the carb swap is a better bet.
The only good thing I can say about CV carbs is they handle elevation changes better than standard carbs do. I regularly operate from sea level to 7,000 feet and I don't do anything but adjust idle speed, If I was racing or didn't do the altitude thing I would consider changing out the carb.
Usually a CV carb will give better low end response than a standard carb of the same throttle bore size. That is why AC gets away with running larger throttle bore carbs on the same engines that Suzuki runs smaller carbs on. When you pop the throttle open on a standard carb the engine sees the full throttle bore and has a drastic drop in air flow velocity with a like drop in fuel flow, causing a stumble. When the air flow picks back up the resulting surge "feels" like better response but in reality the overall time of acceleration is slower than with the CV carb. In most racing applications the rpm's are kept high enough this doesn't effect much, but a quad without a manual clutch can't do that.
Posted by: Bear4570
Quote
Originally posted by: Volvoman
I used the Moose lift kit on mine and like it. I was looking for more ground clearance when going down long rocky down hills in the front end and this really helped. I also like the idea of haveing same tires on both units. Going to bigger tires opens up some problems with CV jionts on the bigger ACs. It may not be a problem with the smaller engine of the 300, but there is much less power to turn them with. Try the lift kit first, it may be all you need. The 300 is in some ways like the old VW, a very well balanced package and when you change one thing it affects others.
Agreed, the lift kit made a big difference in rocks and stumps cleared from stock. After a year, no CV or boot problems other than one stick and none of those since the deluxe boot protector install. The deluxe protectors I installed my 250 are 10 times are better than the new ones on my '05 400, by a bunch.
Posted by: johnycat
hey everyone, just joined, great site. i have a pair of 300 4x4 s and i am very happy with them. i make my living as a mechanic on equipment and am dyin to pep up my bike. my wifes is fine but i wondered if there are some mods for the carb, or a replacement. i have had experience with these cv carbs on several harleys i had and i am not a fan of them, for throttle response and low end power. also is there any exhaust pipe mods or replacements or engine tricks, i dont want to go so far i kill the reliabilty, we ride them a lot and really enjoy them. i just thought it would be more fun to get more out of my 300 than just goin out and buying a bigger machine. any help would be great. thanks for your time.
Posted by: johnycat
well, i have looked high and low, and then low again just to be sure i havent missed anything, and i cant seem to find any aftermarket parts for these bikes. i dont know why, they are some of the most popular ones a c sells. i am lookin to see if maybe stuff for the dvx 400 will work with a little ingenuity. i thought of drilling the jet out myself and lightning the slide and polishing it. as for the exhaust i am lookin at a dvx aftermarket pipe that i can cut the end off and weld on the end of my stock pipe. any one think it will work or am i askin for trouble. thanks.
Posted by: johnycat
hey, thats what i like to hear. thanks for the replies, i hadnt thought about a supertrapp. i have had experience with them on motorcycles and they are nice since you can tune them. i really apreaceate yalls help. i love to tinker on stuff and i really enjoy the way my 300 rides and holds up. i just cant resist tweakin it as much as i can. i was lookin at the inlet tube that runs under the seat and wondering what i could get away with on it. it seems to restrict the incoming air charge as it gets narrow for the tool pouch indention. thought about cuttin the area out of it and makin a flat piece for the top and resealing it to inlet. i believe it would help with air flow if coupled with a good filter element and the other mods. hmmm, now i just have to talk myself into it. i hope i can be of help to you guys if you ever need any, if you are ever lookin for a place to ride in texas just give me a holler. thanks again.
Posted by: johnycat
hey bear, your right, i actually dont want to scrifice my low end torque. i ride mostly all in the woods, climbing and in mud. i really want to get the low end response to improve on my 300. if i could get just a little better thottle response and more bottom end i would be thrilled. thanks for your help.
Posted by: johnycat
hey guys, sorry havent been able to get back to board. worked this weekend, i have been thinkin about what i am gonna do. i talked to a friend who is a dealer and hes goin to ask someone at ac what they are doin to the 300 for people. i dont have any need for elev comp here since we are at sea level, but i didnt realize the cv helped on the bottom end, but it does change things since i dont have a manual clutch to allow for rpm buildup. hmm, this is different than working on motorcycles. i considered bigger tires and lift kit also, but i like the idea of having same size tires on both bikes, and dont see much advantage in lift kit with stock tires. i did order a daylight kit from highlifter, will be here tomorow hopefully. will let you know how good it is. i defintly want to thank you all for respondin, hopefully i can return the favor sometime. bear i saw your snow ride pics. that looks like fun, we dont see much snow down here, only gumbo mud. thanks again, john
Posted by: johnycat
i am goin to keep the stock tires, i like the idea that if we go off on a trip somewhere i can bring one spare wheel/tire that will fit either bike. i was tryin to find out if the highlifter kit installs the same as the moose. i have seen several bikes with the moose kits and it looks pretty simple but effective, ( a good combo anyday in my book) i looked on the highlifter site but didnt see any pics of their kit. they did have some cool stuff though.i am still waitin for my daylight kit to be delivered, it looked like a quality piece. also, volvo, how did you get ahold of a locking front diff, that sounds like a nice mod for muddin? i gotta go for now, talk you all later. thanks, joh
Posted by: johnycat
hey volvo, i guess mine are the later models, one is 2002 and mine is 2004 year. i didnt know the older ones had a locker in them. i take it the new ones dont. thanks for the info. i would like to learn more about how that works. sounds interesting. i got my daylight kit in from highlifter and put it on last night. it is a nice kit, came with all the wiring and bracket, looks good on there and works great. i soldered my connections instead of speed splices though. i didnt want to have trouble in the mud. cant wait to try it out this weekend. talk to you later. john
