need to lower hit for trails,help -CRF's Only Forums

mook13 · by **mook13** » Sun Oct 01, 2006 8:03 am

Well went riding yesterday. The CRF150R expert needs to have more low end totrque for the trails. My GF had a hard time going through the tight stuff slow. Want to stall on her all the time, and when given a litle gas. It hits really hard, not a smooth power up.Kinda like a 2 stroke 85. she actually hit a tree pretty good when it hit. please let me know as soon as they come out with different sprockets. Also trying to find a heavier flywheel for it, contacted a company but no luck. The bike has plenty of power, good suspension, just need help in making it more trail fun. I don't want her to start disliking riding.

Also not impressed with the front brake system on the bike, the drum KLX125 stops better then this one

Brennan82 · by **Brennan82** » Sun Oct 01, 2006 6:49 pm

http://www.crowerpower.com/
Crower Power is in the process of making different grind cams for it now. Maybe you could try a oversize rotor and look into some pads?

by **crfsonly** » Sun Oct 01, 2006 8:56 pm

i can't yet speak from personal experience as we are taking delivery this week of our CRF150RB. however, a couple of things i already know based on conversations i've had with people who have already done extensive testing on the motor. whether it's just jetting and/or the carb being a bit large for the displacement of the motor the off idle response/power isn't what it can be. both jd jetting and tom morgan of white brothers are creating solutions to this. we should have the jd jetting solution in a couple of weeks and will have the white brothers solution this week. this along with a free flowing intake system will help increase the low-end off idle response and power.

we'll have twin air filters in two weeks and a powerflow kit in four weeks.

the final drive gearing is a bit high for most trail use for most riders except for the most skilled riders. we already have the rear sprockets which can help to gear it down for the standard version of the CRF150R. However, the expert rear sprocket is 56T which is the largest we have access to right now. we are working to get front sprockets however these are a new sprocket (i.e. not the same as on a cr80/85 or any other bike prior to this bike). we should have them in stock, if the manufacturers can deliver them on schedule, in three-four weeks.

in the future there will be cams available for increasing the low-end. rest assure we will have in stock all the products necessary to make this bike run a it's full potential. we will be personally testing these solutions as well providing product reviews. stay tuned.

ken

mook13 · by **mook13** » Mon Oct 02, 2006 3:02 am

thanks Ken, you have already helped me tremendously.

On the jetting, the bike seems to want to stall when off the gas and has a little bit of a split second lack of power when starting out, then it hits hard.
Is this a jetting problem or air screw setting? I live in Florida and altitude is low and heat is high.

Funny because when I picked up the bike from Honda i mentioned this jetting problem and they said they never heard of it running lean. but they also didn't know what filter, oil or oil filter it uses. I told them at KTM the rejetted my bike before it went out the door for Florida jetting , they said KTM doesn't know what they are talking about. I've given up on them and will be turing here for all CRF150R help

here is a picture of my nephew doing a superman on it,hahaha

http://pic4.picturetrail.com/VOL731/428 ... 270078.jpg

KRCRFs · by **KRCRFs** » Mon Oct 02, 2006 6:00 am

Ken,

So you didn't mention fly wheel mass. The thing that settled my 250X down for the tight stuff was adding weight to the fly wheel. Anybody, like TrailTech, working on this?

by **crfsonly** » Mon Oct 02, 2006 2:33 pm

great picture! oh to be a kid again. what you are describing is standard lean condition in the pilot circuit and some hesitation from the accelerator pump. i can get the WB carb kit in a couple of days. jd's kit is a couple of weeks out.

on the flywheel weight...no one i know of is working on this right now. i am working to encourage rekluse to make a z-start autoclutch for this bike and that would do a couple of great things...one add flywheel weight, two keep the bike from stalling, three make it a ton more fun to ride for most riders who will be buying this bike.

ken

mook13 · by **mook13** » Tue Oct 03, 2006 5:57 am

Thanks Ken, I will contact you about the WB carb kit, I've never done one before. Is it easy or should I take it to a shop to do?

ScottX · by **ScottX** » Mon Oct 09, 2006 2:20 pm

BBR has a header pipe that is longer and it will give the bike better bottom end power this could help on trail ridding the silencer also has a spark arrestor to keep it legal.

by **crfsonly** » Mon Oct 09, 2006 5:40 pm

yes...they are likely going to offer two pipes a torque version and a rev version. they are still weeks away however. we will have them as soon as they are available.

ken

ScottX · by **ScottX** » Mon Oct 09, 2006 7:30 pm

CHP also has two pipes but they don't have the spark arrester. Scott

by **crfsonly** » Fri Oct 13, 2006 5:57 pm

we just got back from testing the white brothers carb kit and the dubach racing exhaust system. all i can say is wow! noticable power everywhere but very noticable down low. i'm a big person, 240lbs., and this bike was pulling the front end up in first and second. we still haven't opened up the intake yet but this will help as well. we have to do each thing one at a time to see what the incremental difference is.

these two mods are a must in my opinion. formal reviews, pictures, install tips coming soon.

ken

ScottX · by **ScottX** » Fri Oct 13, 2006 11:26 pm

I just got the Dubach pipe to day have not installed it yet. What is the White Brothers carb kit? What size jets did you use? We are heading out to the desert and cal city mx track on the 28th this month and I would like to have it dialed in before we go. Any suggestions would be helpful.

Thanks Scott

by **crfsonly** » Sun Oct 15, 2006 9:54 pm

the carb kit has a new leak jet, main and pilot jets, new diaphram, and a fuel screw. the solution isn't just the main and pilot jets. it's improving the performance of the AP as well as the jetting. here's a link:

http://crfsonly.com/catalog/product_inf ... ts_id/1968

the picture is not accurate but the description is.

ken

alex schot · by **alex schot** » Fri Dec 15, 2006 3:50 pm

hello im 13 years old and in about a week im getting my first bike ever and i only drove a bike once before im getting the CRF150R i just want to know whats the top speed and will it be suitable for me

Alacoque · by **Alacoque** » Sat Aug 02, 2008 6:06 pm

she just isnt experienced enouph, I ride tight trails with mine too, I know what you meen but I dont have a problem because I know how to work the clutch. Its obviously too much bike for her

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