If I ran it wide open with the 26's it didn't rev out all the way, it would slowly get to 50mph and that's it.(in the corn field) I really did notice a huge difference after putting on stockers. I tried and tried to pop a wheelie with the 26's and COULDN'T do it. After I switched tires I could ride one for about 30' if I leaned back,goosed it,and gave the bars a jerk. Now you got me concerned again that I'm still lacking a little power. Anybody know what the float level is supposed to be?

 

Dont jump to any big conclusions... The spedo might be messed up. Drive next to sum 1 in a car n see how fast u were going

 

Has the belt been wet? I've heard if gets too wet it may ruin the belt causing loss of power. Every now and then I take the cover off and clean it out with simple green. After a while ya get a black film all over. I can easily pop wheelies in high or low, it would flip on its top. I'm just flustered to what the prob is.

 

There shouldn't be such a difference with stock tires and 26"inchers...my friend has the same exact setup and can still do wheelies jsut fine...he even has an older model...try adjusting your valves...they can make a big difference if they are not adjusted right...

 

Belt never been wet, rode through 12-14" of water one day for about 15 minutes, checked all drain plugs for water afterwards and they wer all dry. I have a z400 and used to have a banshee so I have lots of "wheelie" experience. It just seems to be lacking the power to turn the 26's.
I have never hit the rev limiter with either setup if that means anything. I'm 6' 220lbs.
I will get my initial service done within the next few weeks and request float and valve adjustments, I will at least ressurect this thread to inform you guys if float,valves,and belt were within specs and if I still have same problems or not. Thanks

 

To check the carb float level, take of the carb, which means removing the side panels, the front rack, front cover, the gas tank cover, the gas tank and then you can get to the carb. with the carb removed, hold the carb in an upside down position, measure the distance from the front mating surface of the float chamber (gasket removed) to the top of the float. The float should be resting on the needle valve, but not compressing it. The float height should be 13mm (0.51in). To adjust the height remove the float pin and bend the float tang, reinstall the float pin and remeasure until it is right.

While you have the gas tank off you can check the valve clearance. you have to remove the recoil starter, the spark plug, and the two tappet covers on the front of the block (intake/exhaust). with the recoil starter removed there is a plastic threaded plug that will allow you to move the piston to TDC. Align the mark on the flywheel with the small notch on the crankcase. by rotating the crankshaft counterclockwise with a wrench. when the piston is at TDC on the COMPRESSION stroke, there should be clearance between the valve stem tips and their respective rocker arm adjusting screws. If there is no clearance, rotate the crankshaft couterclockwise one full turn. Measure the valve clearnace with a geeler gauge. Cold: Intake 0.10 - 0.15 mm (0.0039 - 0.0059 in), Exhaust: 0.15 - 0.20 mm (0.0059 - 0.0079 in). You might need to track down a feeler guage that is this small, I don't believe that the normal automotive set has this small of a feeler gauge. On reassembly be sure to locktite the recoil starter.

The 2003's left the factory without the float adjusted. Before I adjusted my float the spark plug was constantly fouling and the top end was only around 50mph. Since I have adjusted the float the spark plug is a lot cleaner and the top end moved up to 60 plus.

 

WOW! THanks for the detailed reply Grizzlyadams99! I will print and definatly use as a reference. Thanks for the walkthrough on float adjusting also. I appreciate all the time you must have taken to help me out. I didn't realize valve adjustments were so simple on the grizz. If I or the dealer does the checks, I will post results of power being the same or better.[img]i/expressions/face-icon-small-smile.gif[/img]

 

I told everyone in this thread I would post results of dealer service so.......

Initial service yielded no problems. Float was at proper height, valves were within specs, they had to disassemble,clean,and regrease the sheeves/clutch because I sunk it at the badlands last sunday. Belt was OK. Got it home and test rode it today and no difference. Still 50/51mph wide open in the cornfield. Can't pull a wheelie.
I took it out on the road and got it up to 58 mph. I had the perfect opprotunity since my rotten neighbor was outside burning trash letting out thick black smoke. I knew he wouldn't call the cops.
So bottom line is... Stock tires/wheels=68mph and wheelies

26"tires= 58mph and no possible way to wheelie( tried everything) [img]i/expressions/face-icon-small-sad.gif[/img]

Just wanted to let you guys know the outcome of checking all suspected problems. Let me know if you have any thoughts.[img]i/expressions/face-icon-small-smile.gif[/img]

 

For the speedometer readings, they could be off, but i doubt it would account for the 10mph. Itd be nice if you had a gps and could give the reading from that, with and with out the big tires.
Did anyone at the dealership ride and offer an opinion on the performance? These guys ride lots of quads, and would know right away if it wasnt normal.
I know big tires hurt the top end, but didnt think it would cut 10mph from it.

 

I was thinking about getting a gps but I havn't looked into it yet. I wanna get the cheapest one that doesn't look tacky mounted on my quad (any suggestions) Dealer did say they rode it and noticed it died on them a couple of times. ???? They said they cleaned fuel cap ball valve hoping that was the problem.
It's never died on me unless on a steep incline(about 50 degrees or more) or if it's not warmed up all the way(very cold natured). And one day wene it was vapor locking. So all I can figure is they tried riding it without warming up good.
Other than that they told me the quad seemed to be running fine to them.