I picked up a 2012 WR 300 in May. I'm loving it. I've got 45 hours on it now (mostly racing hare scrambles in Missouri) and wanted to get a few things asked as I attempt to work out the last remaining kinks.
1. Carb - I've got the stock carb running OK. Not great. Definitely a bit touchy for lately when I hit a practice lap in the 40s and then race when it's 70+ F. So, hearing how it smooths the jetting process out on it, we sent in a stock Mikuni from a 2011 WR300 (my dad's bike) to RB Designs to have the full works done on it. Well, I've spent two full days trying to get it sorted only to have to give up on it and put the stocker back on, because I know it will bog, but also that it won't seaze up on me. I went with the suzuki needle recommendation, even though it took 2 weeks to get the needle, and I literally have every needle made for this carb now. I need to get my dad's bike back together and I'm fed up with the Mikuni. I've been running Keihen's on my KDXs and KTM before this, so that seems like the way to go. One thing I do have is a 38.5mm oval bore PWK laying around (on my 2008 200 XCW). It starts out down low as a 36mm then ovals up to have the flow of a 38 on top. Any ideas on how that would work on the 300? Since it's not the full 38 like everyone seems to be using, I'm a bit hesitant to try it.
2. Pipe - I've got the stock pipe on it now. I'd like to find something that would help shift the power up a bit to give a fuller mid to top. Down low is beefy enough for all the technical stuff, but when the course opens up, the 300 just doesn't keep pulling like I'd like. As another pipe related question, does anyone happen to know the plug sizes necessary to remove the dents in the stock pipe? I'll pull it off and measure later this week, but in case anyone had that info handy.
3. Gearing - The 5 speed leaves me really wanting to grab a 6th gear, especially with the engine's desire to stay in the low-mid range. The 360 had a 6 speed correct? I thought I had seen info on this fitting the 300. Anyone have experience with this? I figure when I need to split the cases, that might not be a bad idea to swap that out.
4. Clutch - The stock domino lever was giving me crazy blisters. So, I switched to an ASV perch/lever combo. The problem is that I had to take all the adjustment on the cable to the max, and then the perch took up the rest of the adjustment. So, as the race wears on, I don't have enough adjustment. Any recommendations on different clutch cables or ways to lengthen the sheathing to give additional adjustment?
1. Carb - I've got the stock carb running OK. Not great. Definitely a bit touchy for lately when I hit a practice lap in the 40s and then race when it's 70+ F. So, hearing how it smooths the jetting process out on it, we sent in a stock Mikuni from a 2011 WR300 (my dad's bike) to RB Designs to have the full works done on it. Well, I've spent two full days trying to get it sorted only to have to give up on it and put the stocker back on, because I know it will bog, but also that it won't seaze up on me. I went with the suzuki needle recommendation, even though it took 2 weeks to get the needle, and I literally have every needle made for this carb now. I need to get my dad's bike back together and I'm fed up with the Mikuni. I've been running Keihen's on my KDXs and KTM before this, so that seems like the way to go. One thing I do have is a 38.5mm oval bore PWK laying around (on my 2008 200 XCW). It starts out down low as a 36mm then ovals up to have the flow of a 38 on top. Any ideas on how that would work on the 300? Since it's not the full 38 like everyone seems to be using, I'm a bit hesitant to try it.
2. Pipe - I've got the stock pipe on it now. I'd like to find something that would help shift the power up a bit to give a fuller mid to top. Down low is beefy enough for all the technical stuff, but when the course opens up, the 300 just doesn't keep pulling like I'd like. As another pipe related question, does anyone happen to know the plug sizes necessary to remove the dents in the stock pipe? I'll pull it off and measure later this week, but in case anyone had that info handy.
3. Gearing - The 5 speed leaves me really wanting to grab a 6th gear, especially with the engine's desire to stay in the low-mid range. The 360 had a 6 speed correct? I thought I had seen info on this fitting the 300. Anyone have experience with this? I figure when I need to split the cases, that might not be a bad idea to swap that out.
4. Clutch - The stock domino lever was giving me crazy blisters. So, I switched to an ASV perch/lever combo. The problem is that I had to take all the adjustment on the cable to the max, and then the perch took up the rest of the adjustment. So, as the race wears on, I don't have enough adjustment. Any recommendations on different clutch cables or ways to lengthen the sheathing to give additional adjustment?
