Search

GREAT RIDES & STAYS!
Fab Ads
Previous Thread
Next Thread
Print Thread
Rate Thread
Page 3 of 4 1 2 3 4
Re: Air/Fuel mix screw pic? [Re: alexd] #100723 08/10/12 01:33 AM
Joined: Aug 2012
Posts: 18
W
Wanabecruisen Offline OP
Junior Member
OP Offline
Junior Member
W
Joined: Aug 2012
Posts: 18
Oops frown I sure screwed that up didn't I?

Guess I gotta do that again don't I! That will teach me to pay closer attention. Sorry


Old Berzerker
Re: Air/Fuel mix screw pic? [Re: Wanabecruisen] #100827 08/13/12 10:45 PM
Joined: Aug 2012
Posts: 18
W
Wanabecruisen Offline OP
Junior Member
OP Offline
Junior Member
W
Joined: Aug 2012
Posts: 18
OK- finally repeated the test the RIGHT way this time. Warmed up the bike and did the 6th gear 30mph to 10 seconds full throttle test with the side cover on. Bike got to 46mph with the cover on. Repeated the test on the same stretch of road with the air box cover off and it did just a little better. Speed got up to 49mph this time and the bike did feel just a little better going through the gears. Still very low on power though and top speed was still only about 53mph.

What's next and thanks again!


Old Berzerker
Re: Air/Fuel mix screw pic? [Re: Wanabecruisen] #100830 08/14/12 05:31 AM
Joined: Sep 2007
Posts: 5,915
alexd Offline
Platinum Member
*****
Offline
Platinum Member
*****
Joined: Sep 2007
Posts: 5,915

As far as top speed goes...and with your test that didn't quite get to top speed...what happens? Does it "spit" or backfire, or any sharp noises (lean) or does it make a duller stumbling, blubbering noise (rich)?

I was hoping for a more radical change than what you experienced.

There is a science to reading the color of spark plugs, but just for the heck of it, pull it out and see if it's VERY white or dark brown.

If the bike starts well, and idles well when warm...probably your valves aren't too bad. Compression though is another thing.

Alexd


(one) 2006 XT225, (two) 2005 XT225, 2006 FZ1
Re: Air/Fuel mix screw pic? [Re: alexd] #100831 08/14/12 12:43 PM
Joined: Aug 2012
Posts: 18
W
Wanabecruisen Offline OP
Junior Member
OP Offline
Junior Member
W
Joined: Aug 2012
Posts: 18
No sharp noises or backfiring. Just a bit of a miss from time to time. The plug I just removed looked quite good to me. Not wet and color was a chalky light brown color. I see no sign of oil burning or excessive lean condition.

I'll do a compression test tonight. The bike only shows 2600 miles so I should think that would not be the problem but... What should healthy compression be?


Old Berzerker
Re: Air/Fuel mix screw pic? [Re: Wanabecruisen] #100832 08/14/12 02:37 PM
Joined: Oct 2011
Posts: 1,413
1
150ron Offline
Platinum Member
*****
Offline
Platinum Member
*****
1
Joined: Oct 2011
Posts: 1,413
Is this a new problem? were you at one point getting more then 53mph top speed?


2007 DRZ400S
Re: Air/Fuel mix screw pic? [Re: 150ron] #100833 08/14/12 03:00 PM
Joined: Aug 2012
Posts: 18
W
Wanabecruisen Offline OP
Junior Member
OP Offline
Junior Member
W
Joined: Aug 2012
Posts: 18
Originally Posted By: 150ron
Is this a new problem? were you at one point getting more then 53mph top speed?


It's all on pg2 of this post but I bought the bike not running from the original owner. 53mph on flat ground is the best I have been able to do. As I said earlier, I am kinda big for this bike but thought it should do better than that. Maybe not? Is 6' 295# asking too much? (I really need to lose some weight...)


Old Berzerker
Re: Air/Fuel mix screw pic? [Re: Wanabecruisen] #100834 08/14/12 03:15 PM
Joined: Oct 2011
Posts: 1,413
1
150ron Offline
Platinum Member
*****
Offline
Platinum Member
*****
1
Joined: Oct 2011
Posts: 1,413
Im not sure, but it may be a bit much for the bike, being around 300 pounds, but then again it might not, my sister (125 pounds) and her husband (175 pounds) went on my xt250 for a spin, and it did fine with both of them on board.

Do you have anyone who is average weigh around you that could take it out for a good test ride? lets say around 180 pounds or so, that way if they ride it and it goes to about 70+mph (top speed) then you know there is nothing wrong with it, and if it still does the same thing (53mph top speed), then there is definately still a problem.

Thats the first thing i would do.


2007 DRZ400S
Re: Air/Fuel mix screw pic? [Re: 150ron] #100844 08/14/12 08:29 PM
Joined: Sep 2007
Posts: 5,915
alexd Offline
Platinum Member
*****
Offline
Platinum Member
*****
Joined: Sep 2007
Posts: 5,915

This is a weird problem to solve, because there could be several factors playing into the problem.

Weight alone shouln't affect top speed very much, but cross-sectional area of your body (which we can imagine goes up with weight) does. Are your tires at 20 psi or higher? Is your chain in decent condition and well lubricated?

And, is there any possibility that the previous owner changed the gearing from 15/45 to something lower?

Alexd


(one) 2006 XT225, (two) 2005 XT225, 2006 FZ1
Re: Air/Fuel mix screw pic? [Re: alexd] #100846 08/14/12 08:37 PM
Joined: Aug 2012
Posts: 18
W
Wanabecruisen Offline OP
Junior Member
OP Offline
Junior Member
W
Joined: Aug 2012
Posts: 18
Originally Posted By: alexd

This is a weird problem to solve, because there could be several factors playing into the problem.

Weight alone shouln't affect top speed very much, but cross-sectional area of your body (which we can imagine goes up with weight) does. Are your tires at 20 psi or higher? Is your chain in decent condition and well lubricated?

And, is there any possibility that the previous owner changed the gearing from 15/45 to something lower?

I am well under the rated load for the bike and think it should do more. Tires are set at the specified pressure for max load. Chain was neglected but had been lubricated and seems fine now. I doubt the gearing has been changed based on the sellers comments but anything is possible. We'll see what the compression test shows tonight. From my reading it should be somewhere near 170psi or so new right?

Alexd


Old Berzerker
Re: Air/Fuel mix screw pic? [Re: Wanabecruisen] #100848 08/14/12 09:23 PM
Joined: Aug 2012
Posts: 18
W
Wanabecruisen Offline OP
Junior Member
OP Offline
Junior Member
W
Joined: Aug 2012
Posts: 18
No compression numbers tonight. Gonna need an adapter for my compression tester:(


Old Berzerker
Page 3 of 4 1 2 3 4

Web & Site Search
Google
 
Custom TO Customer
Specialty Resource
Fab Ads
Boardcaster Updates

Board Upgrade: Board upgrade to V7.7.3 has been completed on Monday Feb 3rd 2020. Ride safely. Enjoy the new software!

Who's Online Now
0 registered members (), 26 guests, and 3 spiders.
Key: Admin, Global Mod, Mod
ShoutChat Box
Comment Guidelines: Do post respectful and insightful comments. Don't flame, hate, spam.
Top Posters(All Time)
Reggie 11,645
Muniac 6,045
alexd 5,915
Moto Psycho 4,684
Az4x4 4,577
peejman 3,492
kris 2,366
Paul49 1,873
Doc250 1,643
JerryH 1,582
Forum Statistics
Forums38
Topics16,187
Posts145,068
Members5,506
Most Online279
Dec 6th, 2019
Newest Members
Bendito, boisebiker, Bryce Becker, d3dave, Travial
5506 Registered Users
August
S M T W T F S
1
2 3 4 5 6 7 8
9 10 11 12 13 14 15
16 17 18 19 20 21 22
23 24 25 26 27 28 29
30 31
Powered by UBB.threads™ PHP Forum Software 7.7.3