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Discussion Starter · #1 · (Edited)
Over the last 3 to 4 weeks I have been fixing up my old 1998 Honda fourtrax 300. It's in really great shape for it's age. I've replaced the rear end, added a 1.5 inch lift, new super grip rims and 28" interco vampire edls. It's been on 2 rides since I added the tires and rims and I have noticed some lose of power in a few situations but nothing to bad. I know the tires are rather large for the 300 but for the riding I do they do real well. Yesterday and today l have started to add some performance mods to it to try and get some power back. I added a K&N filter and pre filter. Rejetted the carb. Installed a high lifter heavy duty clutch spring kit, and when I tear the front end down tomorrow I will install a spool locker. This is the first time I've ever done any work to an atv so Im trying to make sure what I've done so far is right. On the carb jet I used the 128 main and the four wheeler seems to run fine. It idles great, starts from cold and hot, and idle to Wot feels good with no stuttering. Is there anything that I need to check to make sure I'm using the right size jet? Also I've never installed a clutch kit Nore driven an atv with one. After the installation it waits till you get to a certain rpm before the clutch grabs and pulls which feels good and feels like it has more low end power that way but I'm just making sure this is right. Last question is on the snorkel. I used 1.5 inch pipe and I'm wondering is this a good size for the 300 or should I have went with 2inch since Im jetting it? Thanks for any responses.

Edit to add more info in the jetting. Not sure if this matters but I screwed the air/fuel mixture screw in and backed it out 2 and 1/2 turns like the instructions said.
 

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Over the last 3 to 4 weeks I have been fixing up my old 1998 Honda fourtrax 300. It's in really great shape for it's age. I've replaced the rear end, added a 1.5 inch lift, new super grip rims and 28" interco vampire edls. It's been on 2 rides since I added the tires and rims and I have noticed some lose of power in a few situations but nothing to bad. I know the tires are rather large for the 300 but for the riding I do they do real well. Yesterday and today l have started to add some performance mods to it to try and get some power back. I added a K&N filter and pre filter. Rejetted the carb. Installed a high lifter heavy duty clutch spring kit, and when I tear the front end down tomorrow I will install a spool locker. This is the first time I've ever done any work to an atv so Im trying to make sure what I've done so far is right. On the carb jet I used the 128 main and the four wheeler seems to run fine. It idles great, starts from cold and hot, and idle to Wot feels good with no stuttering. Is there anything that I need to check to make sure I'm using the right size jet? Also I've never installed a clutch kit Nore driven an atv with one. After the installation it waits till you get to a certain rpm before the clutch grabs and pulls which feels good and feels like it has more low end power that way but I'm just making sure this is right. Last question is on the snorkel. I used 1.5 inch pipe and I'm wondering is this a good size for the 300 or should I have went with 2inch since Im jetting it? Thanks for any responses.

Edit to add more info in the jetting. Not sure if this matters but I screwed the air/fuel mixture screw in and backed it out 2 and 1/2 turns like the instructions said.
You do know the spool will make the ATV real hard to steer, don't you?

You can do the spark plug test to see if you are jetted right. Put a new spark plug in it and run it WOT in 5th gear and then kill the engine and check the plug to see what color it is. It should be a light brown or tan color. If it's white, it's too lean. If it's black, it's rich.

Sounds like the clutch kit is right.

I think most people use 1.5 inch pipe.
 

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Discussion Starter · #3 ·
Ok thanks I'll try the spark plug test. How long do I run it wot in 5th gear?
On the spool locker how hard is real hard? I don't do any road riding mainly mudding and some trails. Is it manageable? The 3 wheel drive is killing me.
 

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Ok thanks I'll try the spark plug test. How long do I run it wot in 5th gear?
On the spool locker how hard is real hard? I don't do any road riding mainly mudding and some trails. Is it manageable? The 3 wheel drive is killing me.
Just find a pretty long stretch of road and hold it wide open through the stretch and kill the engine.

A spool locker is pretty hard to turn. It might be OK for mudding, but if you ride any distance on trails you probably won't like it. A Detroit Gearless Locker isn't as hard to steer, but they are a lot more expensive. The ideal setup would be a Detroit Gearless Locker and a Warn 4-2-4 Select to disengage the front axles, but the Warn 4-2-4 has been discontinued. You can still find them on Ebay sometimes.
 

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Discussion Starter · #5 ·
Ok well I've already purchased it and for a 35$ mod I think I'll have to live with it until I can afford the Detroit. :dry:
 

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you are going to have some popeye arms after riding with that locker!!
 

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your going to lose even more power with all 4 wheels spining also instead of 3.

might want to put a pipe on it also to help out.

i would say get a gear reduction and be done with it but i dont know if the 300 has one available.
 

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Yeah a good aftermarket pipe does a lot for a small engine.I'm not sure if many are made for the 300 but you could buy a used hmf or something from ebay and mod it to fit your quad.
 

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Yeah a good aftermarket pipe does a lot for a small engine.I'm not sure if many are made for the 300 but you could buy a used hmf or something from ebay and mod it to fit your quad.
I know they use to make them for the Fourtrax 300, but I'm not sure how many is available now. I'm pretty sure they still make an aftermarket pipe for them, though. I think SuperTrapp makes one.
 

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Discussion Starter · #11 · (Edited)
your going to lose even more power with all 4 wheels spining also instead of 3.

might want to put a pipe on it also to help out.

i would say get a gear reduction and be done with it but i dont know if the 300 has one available.
Well the way I see it is I won't loose much power if any. If I'm on level ground with all 4 wheels touching then even without the locker I have 4 wheel drive. Only thing the locker is going to help is when for example if I'm in a mud hole and I shift all my weight to one side of the four wheeler then to grab traction at the bottom of some ruts, I will have the front tire on the side that I'm shifting my weight on pulling at all times. Before the locker the front tire that I shifted the weight on would never get power.

My next mod is a exhaust but I'm going to wait a while since they are so expensive. The supertrapp is around 300$ and I've spent so much so far. I havnt found any other cheaper pipe for it. On the gear reducer I would love to add one but I havnt found one for the 300. As of right now I think I will have enuff power to get me through most things. Even before i started adding performance mods I felt ok in most situations but I did bog a few times. I'm going to take it back out real soon and see how it does.
 

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Yeah I agree it will help you in the mud and if you don't do roads or hard pack trails much you'll probably be okay but you will just have to try it and see.
 

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well yea my statement would only apply for in the mud when your bogging down if so. sorry i did not clarify.

you are now dispersing your power between 4 wheels instead of 3 thus putting more strain on the motor and causing it to bog down more (if in thick mud) thus i say you would lose some of your motor power.

like i can spin 2nd gear, sometimes 3rd good in mud being that im 2wd with a 300. but if i was 4wd i probably would not be able to spin them as hard. see what im sayin?? more wheels to turn. thus requiring more power from the motor, thus causing you to bog more in a big mud pit.

i have not ran into this personally with a 4x4 but its all over highlifter how guys when they get a locker notice they bog more in mud pits.

just trying to give you a heads up.
 

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in simplest terms, not that you will lose power, but you will bog down easier, thus might leave you wanting more power from the motor.
 

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hey guys. what exactly the high lifter clutch kit replacing and what does it do for your performance??
 

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i think its just the springs and they put more pressure on the clutches making it so its harder for the clutches to slip.

i have also heard it raises the stall.
 

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i think its just the springs and they put more pressure on the clutches making it so its harder for the clutches to slip.

i have also heard it raises the stall.
Yeah, that's what it does. It replaces the springs in the centrifugal clutch with stronger springs and raises the stall speed.
 

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do you know how much it raises the stall and what the stock stall is???


from what i have heard the stock stall is 1200-1500 and the HL raises it too 2200-2400. but i dont know.
 

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do you know how much it raises the stall and what the stock stall is???


from what i have heard the stock stall is 1200-1500 and the HL raises it too 2200-2400. but i dont know.
I don't really know.
 
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