450F Front sprocket wont come off

MY-BLUE-BEAST · Apr 2, 2014

TurtleShifter:
I wonder if there is a difference between the steel frame and aluminum frame models. It just doesn't seem possible that I could get a 14 counter on mine and leave the case saver in. Might be some slight variances between the models

It seems to fit fine, tight, but it fits.

TurtleShifter · Apr 2, 2014

MY-BLUE-BEAST:
It seems to fit fine, tight, but it fits.

My chain almost appears to touch my case saver with my 13 on there. If I was to put a 14 on there, I would have to take it off, I think........ I may just have to go out and buy one and see.....

MY-BLUE-BEAST · Apr 2, 2014

TurtleShifter:
My chain almost appears to touch my case saver with my 13 on there. If I was to put a 14 on there, I would have to take it off, I think........ I may just have to go out and buy one and see.....

Go for it, whats the worst that can happen?

Oh... and this is post 600 for me! :banana:

ossagp · Apr 3, 2014

I was thinking the same thing about fitting the newest rigs with a bigger sprocket. I have seen 14's on the 2008 wr 450. The newest yzf seems noticeably tighter.

TurtleShifter · Apr 3, 2014

I'll show you mine if you will show me yours :eek:

ossagp · Apr 3, 2014

How does it look from the swingarm side. I put a rear sprocket on that required a modification to the chain guide. He had the 14 on already. The chain came off and went back easily, and I don't believe he modified or had anyone else modify his existing protector. FYI the sprocket on back was a 55.

The countershaft is going to grow nearly 1/10" nearer to the guard and the swingarm.

TurtleShifter · Apr 3, 2014

The space is actually just a tad short of 1/4" to the swingarm guide, which I just put on this week. I had been running a 12/49 combo with all of the tight, rocky riding I have been doing the last few months (13/50 being stock). This after the valve job, YZ Cams and a .5 bump in piston and a "clean up" port job. Figured I didn't need to go 92+ so I went down to the 12. But know as the Spring rolls around and I do more dual sport riding, I'm gonna throw the 13 back on. Might go up in the back, we'll see.

ossagp · Apr 3, 2014

Should fit yours too, but I can't believe a 15 will fit, without modifying the guard and the wear block, maybe not then on the swingarm side. I looked at a 2013 kx450 last summer, I don't think it will take the 14 even. the 14 should make it nicer for the longer pavement.

TurtleShifter · Apr 3, 2014

I know a 14 would fit based on the amount of space in the back, you don't think the front space is a closer concern? If the sprocket moves 1/10th closer, wouldn't that mean the same for the front, but the case saver? That bad boy is pretty darn close.

It's just an interesting observation. I really like the look of the back sprocket. I would like to get it in a 52 but so far the 2 places I usually shop, RMATV and MSSS, only had a 49 and 50.