Power loss, reduced power, wot, high speed power loss

wizzizer · #11 (**permalink**) 09-12-2008, 07:14 PM

cool. i have some dellorto jets that i can use in lieu of redrilling.

btw-someone on this forum said you cant redrill them but i will check the thread youve suggested. thanks!

**Bikeguy Joe** · #12 (**permalink**) 09-12-2008, 07:20 PM

Sure you can re-drill, but using del'orto's will be the easiest and best.

Biker Mike · #13 (**permalink**) 09-12-2008, 08:38 PM

Quote:

Originally Posted by wizzizer

okay, so i checked my motor mounts and they were tight (i tightened them as much as i could anyway just to be sure) so i guess thats not the problem.

the weird thing is that if i go uphill (one that would normally bog the motor) it starts firing correctly and pulls just fine, but when on flat ground at wot it misfires (i think thats whats happening) and will not clear out and rev.

i'm at a loss. i even tried a bigger mainjet but that didnt help any.

check the factory intake gasket as well. It gets saturated with fuel and oil, it then expands and may interfere with the flow to the cylinder. It also covers half the inlet hole on the jug. I just removed the gasket and used blue sealer.

wizzizer · #14 (**permalink**) 09-12-2008, 08:50 PM

i replaced the intake gasket on day 2 cuz it was oozing and seemed to be disolving entirely. so i bought some gasket material onto which i traced the manifold and cut with an *exacto, it worked out good so i think i'm ok there.

*hole punches are easiest for cutting the bolt holes.

luke duke · #15 (**permalink**) 09-13-2008, 02:54 PM

I had the same prob. A dellorto .65 jet cured it for me!.

2old2learn · #16 (**permalink**) 09-17-2008, 01:02 PM

Quote:

Originally Posted by wizzizer

okay, so i checked my motor mounts and they were tight (i tightened them as much as i could anyway just to be sure) so i guess thats not the problem.

the weird thing is that if i go uphill (one that would normally bog the motor) it starts firing correctly and pulls just fine, but when on flat ground at wot it misfires (i think thats whats happening) and will not clear out and rev.

i'm at a loss. i even tried a bigger mainjet but that didnt help any.

I had a very similar problem on my HT engine after about 150 miles. I had to lower the clip on the needle to make it run richer at Wide Open Throttle, WOT. Suddenly instead of being limited to 20 mph now I can run at 30 mph. I'd have never thought it would make that much difference. I had tried to go the other way thinking it was too rich at first. Trial and Error.

mgladden2 · #17 (**permalink**) 09-17-2008, 01:47 PM

I still think it's your motor mounts. Uphill would cause the engine to vibrate differently against the frame. I would try to completely unbolt then re-seat your engine. Also, change from factory threaded rods to M6 x 50 and M6x25 threaded bolts (get some lock washers). Good luck!