How to make a 250R faster
#1
#3
#4
How to make a 250R faster
It runs even with a stock z400 right now I am looking for a little more power to be able to beat a z-400 easily. I was thinking about a bigger carb and maybe getting the head milled alittle bit. What do you guys think i should do i saw a performance carb on ebay the other day but it said it was for the 87 up models why won't it work on the 86s?
#5
How to make a 250R faster
The 85-86 and 87 and up motors are completely different. A bigger carb will only make more power if your engine is ported to accomodate a greater amount of air flow. Also, as a rule, larger carb = more top end, smaller carb = more low end. I've heard that the 85-86 motors are tricky to port because it's easy to lose the good bottom end torque they have stock. I've also heard that these motors can be made fast but they will be peaky (not a very broad powerband).
The LT500 motor is a common swap that the real go fast guys out west put in the early LT's because they're much lighter than the later LT or Zilla frames. That's the route I eventually plan to take.
The LT500 motor is a common swap that the real go fast guys out west put in the early LT's because they're much lighter than the later LT or Zilla frames. That's the route I eventually plan to take.
#6
#7
Trending Topics
#8
#10
How to make a 250R faster
A cheap mod that I always like is a set of Boyesen reeds, milling the head will give you better low end and midrange but not neccesarily more top end. If it's already got the power to pull 5th all the way through and you want more top speed step up one tooth on the front sprocket. If it's not jetted correctly there is more power to find there as well. Since you are limited on your pipe choices, porting and a bigger carb. I used a 35mm Mikuni TMX carb on mine that I got off ebay for 30 bucks, since it was still small it has good throttle response but because it's a newer design than the stock TM it has a higher peak flow rate. With stock porting I wouldn't go larger than a 36mm as you will lose bottom end power, I know this from experience.
Thread
Thread Starter
Forum
Replies
Last Post
Traci Carnahan Simmons
Classifieds, Garage Sale & Swap Shop
1
08-09-2015 03:00 PM
CRamshaw777
Classifieds, Garage Sale & Swap Shop
0
07-18-2015 05:46 PM
Currently Active Users Viewing This Thread: 1 (0 members and 1 guests)