Want more power from your 2010 TC250 and a surprise from the Husky factory!

I'll need to pull mine to get a measurement. Will try to tonight after work.

Yes Krieg the O ring size when you get a chance would be great, thanks. Maybe we should start a 2010 TC250 mod section where we could keep jetting, O ring, exhaust, etc.

Found size on TT, #78, 7/16" OD, 1/4" ID, 3/32" Thick.

Hey thanks mxer74!

Actually, mine is 1/4" ID, 3/8" OD. Mine's a bit tighter than the one Blake described, but not by much. Either should work, Blake's would provide a bit less "hit" under load, provided the carb is jetted correctly.

Thanks Krieg now we have two options.

Sorry Dean... not to pee in your Wheaties... but My hand is always forced forward on the throttle when I start my 4 strokes. I've got too many years of experience to do otherwise. This ain't my first Rodeo on starting 4 stroke bikes.

In fact, I've been starting my '10 TC 250 virtually every night, multiple times, with various jetting and fuel screw and AC pump linkage settings, just to see how it behaves. Tonight, for instance, I kicked it hot and cold, intermittently over a 2 hour period. I'm anal like that. Based on many weeks of doing the same things to figure out the TC's starting preferences, I'm about 99% sure the TC is sensitive to pilot jetting and fuel screw adjustments.

To say that the AP comes into play by "simply breathing on it" is WRONG no matter how tight the AP linkage is... and especially when dealing with people who've got experience and know what they're talking about. I don't care if the AP linkage is superglued to the rider's arm... that rider would have to be a complete idiot to not understand how to keep from opening the throttle while starting. That may sound self righteous on my part, and I'm sorry if you think that of me, but I know for a fact that the AP WILL NOT move if the throttle remains motionless.

I'd really be interested to see factual evidence to the contrary.

Ok I somewhat understand what you guys are talking about but my question goes to the OP's thread heading question: "Want more power from your 2010 TC250 and..." I still don't know what he did if anything to get more power. Can someone shed some light on that part of his post please? Thanks, John

IMHO the OP didn't do anything to get more power. I'll leave it at that.

That's what I was gathering, thanks.

According to Coffee a bigger leak jet is more effective for the faster the rider and the more on off on on the throttle there is. This is why we maybe experiencing more power well at least a much better throttle responce. We ride mainly supercross where the throttle is getting snapped on and off the whole time so it looks like the 60 leak jet is helping. Aside from that I also think the Boyesen AP cover may help with the general responsiveness of the bike....one thing is for CERTAIN we have 3 riders here including myself who have all felt the difference!!

I did the wire thing on the TXC just to try it. I got similar results. When I would just start to crack the throttle after coasting it would richen things up too much and sputter. I changed to an O-ring and things were about perfect for my style. I think what the OP is experiencing is better throttle response and not more top end. I think if he used an O-ring instead of the wire, he could probably go down on the leak jet. As for the starting, unless he's flaming out after the AP squirts too much fuel, I still can't see how anything but the pilot and fuel screw are in play, unless he's turning the throttle while kicking hot.

This is some good reading guys and things are clearing up a little. So Krieg does your TC keep pulling at the top?
Man I wish our friend wouldn't have sold his YZ250F I would love to do some side by side pulls across my back field. Right now everyone's on 450F's we ride with and my son pulls them hard on the MX track but that has more to do with rider bike combo IMHO.

We increased the idle speed and the bike seems to start much easier now!

Cool let's keep the info sharing going.

Good point on the idle as well. All the 4T's I've ever owned I set to 1900-2200 on idle.

One of the reasons I've been experimenting almost nightly with hot and cold starts on the TC 250 is to find the "sweet spots" on fuel screw adjustments at various temps. One thing I'm learning with the TC is that it is very sensitive to the screw adjustments. 1/8 to 1/4 turns in some cases meant the difference between 1 kick hot starts and 3-4 kicks.