Just wondering what is the biggest front sprocket you can run on the yfz and still retain the stock case saver/chain guard. Looking to gear up as much as possible for St. A's!

 

Just guessing, but from what I can tell with a visual inspection, I'd say a 14 tooth.

BTW, when are you going to St. A's?

 

I've heard guys say that they've got a 15 that fits, but I had to grind my case saver ever so slightly to get it to work - not a huge deal.

 

I have a 15t fits no problem.

 

i had to grind for the 15 to fit.

 

So my guess is that the tolerances are so close that it probably depends more on
who makes the sproket. Since selector indicates he had to make some slight mods
while stevendsm95gst did not, it would be interesting to know who they bought
their sprokets from.

In my case, I went the other way. I'm running a 12 tooth front and a 42 tooth rear.
While the 12 tooth was no problem, the 42 tooth interfered with the plastic swing
arm guard. Given that plastic doesn't stop lava rock, this wasn't any big deal and we
have replaced them. What I did do was check to make sure that UM (the mfg that
I picked) had enough clearance for the larger rear sprokets.

I'd say go for it. My front sprokets only cost $7.00, so even if you had to throw them
away, you aren't out that much.