Performance Modifications - Suzuki ATV Forum
Suzuki KingQuad 300 Discussions for the King Quad 300

Reply
 
LinkBack Thread Tools Display Modes
post #1 of 13 Old 04-17-2019, 06:21 PM Thread Starter
ATV Enthusiast
 
OldReliable's Avatar
 
Join Date: Feb 2019
Location: Central NC
Posts: 69
Garage
Performance Modifications

So I’ve had my KQ-300 for about 3 months now and I love it. The bike has plenty of power for my needs but I keep reading about various performance mods that have been available over the years?

I’m just curious to know what all mods were/are available? From my research there are,
1. Big bore kits
2. Slip on mufflers, (Cobra Exhaust?)

What else is there or has there been for these sleepy little engine? Any cams available from other engines with similar top ends?

Also, is there any benefit to changing the jetting on a factory bike?

My KQ has the idle screw set to 2-5/8 turns out from lightly seated as the book indicates and it is a little rich at idle, it will start no choke every time if I crack the throttle open, and that’s hot or cold. For those who tune these Mikunis does turning the screw in lean or enrich the mixture?

Thanks!
OldReliable is offline  
Advertisement
 
post #2 of 13 Old 04-17-2019, 06:48 PM
Suzuki ATV Master!
 
TCIII's Avatar
 
Join Date: Nov 2013
Location: texas
Posts: 1,633
These bikes really don't respond to mods very well in the horsepower gain department. Big bore kits are probably the easiest way to gain power but with many headaches with re-jetting and overheating problems. The amount of power gains for the cost involved will have to be in the mix in your decision . In my opinion and 2 cents.....I would leave well enough alone....but that's just me.

As far as re-jeting ....I tried to go up 1 size on the main jet ( 117.5 to 120 ) and it did not like it at all....went back to stock.

2002 King Quad 300
2001 King Quad 300
1997 King Quad 300
1997 quad Runner 250 2x4
2008 Kawasaki 250 Bayou 2x4
2013 TaoTao 110

Last edited by TCIII; 04-17-2019 at 06:54 PM.
TCIII is offline  
post #3 of 13 Old 04-18-2019, 06:56 PM
ATV Enthusiast
 
Dan Superchi's Avatar
 
Join Date: Apr 2019
Posts: 53
Garage
I installed a Kimpex muffler when my stock one rotted out and it responded it it nicely. It may just be the lack of the old plugged up spark arrestor... but a noticeable smoothness down low and more punch on the top end.

I also run a lightly oiled UNI filter and I went 1 notch up on the carb needle. Other than that, I would just buy a bigger machine if you want bigger performance.

"If women don't find you handsome, they should at least find you handy." - R. Green
Dan Superchi is offline  
Advertisement
 
post #4 of 13 Old 04-18-2019, 10:45 PM Thread Starter
ATV Enthusiast
 
OldReliable's Avatar
 
Join Date: Feb 2019
Location: Central NC
Posts: 69
Garage
Both of those posts are great insight, as I indicated the bike is more than adequate power wise for my needs. I have other machines that satisfy my need for power. Just curious more than anything else.

Funny you mention the factory spark arrestor, my service manual mentions removing the plug and cleaning the carbon out of the muffler on a regular interval! From the looks of it, my plug has never been out and I don’t think it’s a wise idea to try to extract it now!

To my knowledge Kimpex is the only current manufacturer of aftermarket exhausts for these bikes?
OldReliable is offline  
post #5 of 13 Old 04-19-2019, 09:20 AM
Extreme ATV Enthusiast
 
440Tim's Avatar
 
Join Date: Jan 2019
Posts: 154
All I've found specifically for the kingquad 300 and quadrunner 250 are...
big bore kits
performance camshafts and chains
And high flow filters
Might be more performance parts out there but i haven't found them.

Im running K&N air and oil filters. My stock filter was garbage when i bought the quad. When i do my timing chain I'm thinking about trying a camshaft from hotcams.

I've decided not to go to far out of my way trying to build power. Just upgrading when things need fixed or replaced.

From what I've read the problem with big bore kits overheating is caused by going lean. If you don't rejet the carburetor and tune it correctly it will be lean and overheat.
440Tim is offline  
post #6 of 13 Old 04-19-2019, 09:46 AM
Suzuki ATVer
 
bparks38652@gmail.com's Avatar
 
Join Date: Oct 2018
Location: MS
Posts: 27
Muffler and filters are good ideas from my experience. Don't start changing a bunch of stuff if you are happy with what you have, just enjoy it. Your bigger units can do heavier applications. I have a 300 kq as well and it does all I need to do. Always remember that "Wants" and "Needs" are 2 entirely different things. Enjoy!
post #7 of 13 Old 04-19-2019, 09:53 AM
Super Moderator
 
ajl719's Avatar
 
Join Date: Jan 2010
Location: Iroquois Falls On, Canada
Posts: 7,201
Send a message via Yahoo to ajl719
Removing the plug to get to the spark arrestor if it looks or hasnít been removed is probably not a wise idea. The plugs tend to rust in place and usually cause more damage trying to remove them then anything.


Sent from my iPhone using Tapatalk

2000 Suzuki King Quad 300 4x4
K&N Air Filter
2300 lbs Superwinch
Kenda Bear Claws (Rear 25X10-12) - (Front 24X9-11)
Differential Lock Mod
14,000 + km/s
ajl719 is offline  
post #8 of 13 Old 04-20-2019, 04:30 PM
ATV Enthusiast
 
Dan Superchi's Avatar
 
Join Date: Apr 2019
Posts: 53
Garage
Quote:
Originally Posted by ajl719 View Post
Removing the plug to get to the spark arrestor if it looks or hasnít been removed is probably not a wise idea. The plugs tend to rust in place and usually cause more damage trying to remove them then anything.
Agree! You may end up twisting out the whole bung if it's rusted too thin. Plus, the "drain" on the back of the muffler really doesn't affect the actual spark arrestor in the muffler tip.

"If women don't find you handsome, they should at least find you handy." - R. Green
Dan Superchi is offline  
post #9 of 13 Old 04-26-2019, 03:25 PM Thread Starter
ATV Enthusiast
 
OldReliable's Avatar
 
Join Date: Feb 2019
Location: Central NC
Posts: 69
Garage
I pretty much new all that had been said already but sometimes it helps to hear it from someone else! My 99’ KQ300 runs great and makes 180PSI cold on my compression tester. I’d love to have a little more punch but I already have my reservations about tearing down a perfectly good engine in hopes of trying to make it into something that it isn’t and never will be.
OldReliable is offline  
post #10 of 13 Old 04-26-2019, 04:56 PM
Super Moderator
 
ajl719's Avatar
 
Join Date: Jan 2010
Location: Iroquois Falls On, Canada
Posts: 7,201
Send a message via Yahoo to ajl719
I look at it this way. The KQ isnít a speed demon, itís more a torque monster with all the gear options available, low/super low range. A lot of people say this thing would pull a house. And your better served leaving it the way it is and itíll serve you well.


Sent from my iPhone using Tapatalk

2000 Suzuki King Quad 300 4x4
K&N Air Filter
2300 lbs Superwinch
Kenda Bear Claws (Rear 25X10-12) - (Front 24X9-11)
Differential Lock Mod
14,000 + km/s
ajl719 is offline  
Reply

Quick Reply
Message:
Options

Register Now



In order to be able to post messages on the Suzuki ATV Forum forums, you must first register.
Please enter your desired user name, your email address and other required details in the form below.

User Name:
Password
Please enter a password for your user account. Note that passwords are case-sensitive.

Password:


Confirm Password:
Email Address
Please enter a valid email address for yourself.

Email Address:
OR

Log-in










Thread Tools
Show Printable Version Show Printable Version
Email this Page Email this Page
Display Modes
Linear Mode Linear Mode



Similar Threads
Thread Thread Starter Forum Replies Last Post
Quadrunner performance upgrades 440Tim Suzuki QuadRunner 250 3 01-24-2019 03:56 PM
2007 KQ 450 performance reese600 Suzuki KingQuad 4 12-27-2018 07:20 AM
Ltz 400 performance 400MAG Suzuki QuadSport 0 02-15-2016 02:40 PM
Performance Tip TUBBYTUBB Performance Modifications 0 06-15-2012 07:18 PM

Posting Rules  
You may post new threads
You may post replies
You may not post attachments
You may not edit your posts

BB code is On
Smilies are On
[IMG] code is On
HTML code is Off
Trackbacks are On
Pingbacks are On
Refbacks are On

 
For the best viewing experience please update your browser to Google Chrome