Pros and Cons of the different big bore kits?
#1
08-31-2007, 04:05 AM
Join Date: Mar 2006
Location: East Texas, USA
Posts: 698
Pros and Cons of the different big bore kits?
I'm probably suffering from reading too much on the forums right now. I remember reading something about the horsepower of the various big bore kits but, I cannot find it now. I'm guessing my "search fu" is weak on this site.
From what I have gathered, the 300cc upgrade is a waste at this point in time because the 331cc big bore kits are basically the same price and complexity to install. The 340cc big bore kit seems like it costs about $300 more but, installs basically the same.
What sort of power do the various engine upgrades provide for what approximate cost? I will do all the "free" upgrades on my stock engine but, after I get secure in the lower power of my new purchase, I know I will be upgrading it because I want to have some power left when I'm doing highway dashes between two points. Out where I'm at, it really isn't practical to stay completely off the Interstate which runs at a steady 80-85MPH all the time. I want to be able to run a solid 65MPH and still have some power left over for safety.
Also, what carburetor is the right match for the big bore kits? The $600 pumpers seem to be overkill because there are some good options in the $300 range. What pairings are the good ones for what sort of horsepower and cost?
If I missed the thread where this is discussed in my searches, please post a link.
Thanks in advance!
From what I have gathered, the 300cc upgrade is a waste at this point in time because the 331cc big bore kits are basically the same price and complexity to install. The 340cc big bore kit seems like it costs about $300 more but, installs basically the same.
What sort of power do the various engine upgrades provide for what approximate cost? I will do all the "free" upgrades on my stock engine but, after I get secure in the lower power of my new purchase, I know I will be upgrading it because I want to have some power left when I'm doing highway dashes between two points. Out where I'm at, it really isn't practical to stay completely off the Interstate which runs at a steady 80-85MPH all the time. I want to be able to run a solid 65MPH and still have some power left over for safety.
Also, what carburetor is the right match for the big bore kits? The $600 pumpers seem to be overkill because there are some good options in the $300 range. What pairings are the good ones for what sort of horsepower and cost?
If I missed the thread where this is discussed in my searches, please post a link.
Thanks in advance!
#3
08-31-2007, 09:56 AM
Join Date: May 2006
Location: Pittsburgh, PA
Posts: 12,584
RE: Pros and Cons of the different big bore kits?
OMG....... are you serious? I better get a MX fender ASAP.... that might have been my problem all along....... damn........ lol thats good
Id like to do the 300 or 331...... but foremost id like to have a bike thats not broke.......
Id like to do the 300 or 331...... but foremost id like to have a bike thats not broke.......
#5
08-31-2007, 12:40 PM
Join Date: Oct 2006
Location: Kersey, PA
Posts: 463
RE: Pros and Cons of the different big bore kits?
My 340 runsabout as hot as the stock engine did with the smog crap installed. I've never had any overheating issues and my electric fan has never kicked on. Even on tight trails in 90+ degree heat, the stock radiators cooled it just fine.
#6
08-31-2007, 12:58 PM
RE: Pros and Cons of the different big bore kits?
Did you ever post a pic of that Supertrap?
ORIGINAL: mustang
My 340 runsabout as hot as the stock engine did with the smog crap installed. I've never had any overheating issues and my electric fan has never kicked on. Even on tight trails in 90+ degree heat, the stock radiators cooled it just fine.
My 340 runsabout as hot as the stock engine did with the smog crap installed. I've never had any overheating issues and my electric fan has never kicked on. Even on tight trails in 90+ degree heat, the stock radiators cooled it just fine.
#7
08-31-2007, 12:59 PM
RE: Pros and Cons of the different big bore kits?
"2006 KLX250s - 340 kit, TM36, Supertrapp"
Mustang,
What header pipe are You running?
Mustang,
What header pipe are You running?
#9
08-31-2007, 01:37 PM
Join Date: Oct 2006
Location: Kersey, PA
Posts: 463
RE: Pros and Cons of the different big bore kits?
Here you go...
I made the head pipe myself out of 1 1/2" stainless tubing. You can read about it here:
https://www.kawasakiforums.com/m_136166/tm.htm
https://www.kawasakiforums.com/m_138311/tm.htm
Even though I made my own head pipe, any KLX300 head pipe will work with the Supertrapp slip-on.
I made the head pipe myself out of 1 1/2" stainless tubing. You can read about it here:
https://www.kawasakiforums.com/m_136166/tm.htm
https://www.kawasakiforums.com/m_138311/tm.htm
Even though I made my own head pipe, any KLX300 head pipe will work with the Supertrapp slip-on.
