Snipe99 Posted September 10, 2007 Report Share Posted September 10, 2007 How is this possible? I dont have to most modded up shee but dang. This YZF450 is bone stock I thought I would pull away at least but we stayed neck and neck all three passes. He's stock I have Toomy's T5 and Kihien 35mm carbs K&N filter with stock heads stock reeds. My jetting is #155 mains and pilot is #45. Is the YFZ450 just a fast 4stroke quad or what? If my shee was stock I would have been smoked I do believe. Quote Link to comment Share on other sites More sharing options...
Jhughes7 Posted September 10, 2007 Report Share Posted September 10, 2007 35mm dual carbs? Quote Link to comment Share on other sites More sharing options...
letsgetthisdone Posted September 11, 2007 Report Share Posted September 11, 2007 if you have 35mm duals, those carbs are WAY to huge.. Quote Link to comment Share on other sites More sharing options...
Snipe99 Posted September 11, 2007 Author Report Share Posted September 11, 2007 if you have 35mm duals, those carbs are WAY to huge.. So you think thats the problem? Why would it run so good and have a perfect plug readings and have good top end and bottem end? They may not be 35mm carbs I bought this quad from a friend and all this was on the quad when I got it from him. If they are not 35mm carbs where on the carbs can I check to see what mm they are? They are the Keihin PWK style carb. Im going off of what I was told when I bought from him. Quote Link to comment Share on other sites More sharing options...
letsgetthisdone Posted September 11, 2007 Report Share Posted September 11, 2007 measure the inside diameter of the small side of the carb, that'll tell you what size they are.. Quote Link to comment Share on other sites More sharing options...
WALLACE84 Posted September 11, 2007 Report Share Posted September 11, 2007 You can check on www.sudco.com to match the numbers on the carbs. If they are 35's, like everyone else said, thats WAY to big for a stock port. Hell, I was told to run 30s on my dune ported shee with alot of other bolts ones by the guy who ported it Quote Link to comment Share on other sites More sharing options...
Jhughes7 Posted September 11, 2007 Report Share Posted September 11, 2007 I would say that 35mm is far to large of a carb but thats not the reason why you lost, I got my ass handed to me buy a 2007 stock yfz with a 70lb kid on it. They are decently quick Quote Link to comment Share on other sites More sharing options...
Ducman Posted September 11, 2007 Report Share Posted September 11, 2007 Get your cylinders ported and some traction and it will be a different story. With the YFZ, at least my 04', if you just take the air box lid off, put on a slip-on pipe and re-jet it will wake up a make a bunch more power too. Quote Link to comment Share on other sites More sharing options...
John Posted September 11, 2007 Report Share Posted September 11, 2007 Get your cylinders ported and some traction and it will be a different story. With the YFZ, at least my 04', if you just take the air box lid off, put on a slip-on pipe and re-jet it will wake up a make a bunch more power too. It's called traction, my Banshee, which is all stock for the moment, although I just picked up some T5s but have yet to install it, can barely keep up with my 400EX. YFZs are some of the lightest and quickest of the 450s. I would definitely look into workin on your launch and shaving weight. Banshees are pigs as most of them weigh 60lbs more, that is a lot of extra weight to carry. Quote Link to comment Share on other sites More sharing options...
RagunCajun Posted September 11, 2007 Report Share Posted September 11, 2007 How is this possible? It all starts by you reading post after post about someone with a banshee beating some 450's with bad drivers or lying about it. You get this idea that your shee will beat 450's. Then you race them and you are like wtf. I was there..... My shee with bolt ons lost. I believe with the proper traction, you will do better but all that yfz has to do is get a few bolt ons and he is once again ahead of you. Get ported and good tires. You must have a good set of tires on the back. I just bought some knarlys and i cut every other row of knobs off. Talk about hooking up! Quote Link to comment Share on other sites More sharing options...
locogato11283 Posted September 11, 2007 Report Share Posted September 11, 2007 what surface did this race take place on? that will make a huge difference.. i dont think your carbs are the problem. id be looking more at traction, gearing and take off.. Quote Link to comment Share on other sites More sharing options...
Snipe99 Posted September 11, 2007 Author Report Share Posted September 11, 2007 what surface did this race take place on? that will make a huge difference.. i dont think your carbs are the problem. id be looking more at traction, gearing and take off.. We raced on a back county road for about a 1/4 mile. The tires I am running are Mud Sharks. I rode the clutch to get the rpm's up before my launch and hooked up and on the pavement I did not have a traction problem. I caried the front wheels about 10 feet about 12inches off the ground. If I done a better launch I would win and vice versa. He getting a new full exaulst system in a few weeks so I will be behind him on that race. Does the Coolhead offer and peformance gains or just help your engine run cooler thus making you power that way? Also the V3 reeds that I hear many of you are using should I invest in this item? Quote Link to comment Share on other sites More sharing options...
RagunCajun Posted September 11, 2007 Report Share Posted September 11, 2007 (edited) Get your juggs ported. I wish you lived closer so you could ride my bike. Ported juggs are a night and day difference. Check out flotek, $380 for the portjob and flywheel lighening like i got. Plus a little extra for the new gaskets you have to replace. While you're at it, get him to mill your stock head. Done. No need for a pricey cool head. Edited September 11, 2007 by RagunCajun Quote Link to comment Share on other sites More sharing options...
kb247 Posted September 11, 2007 Report Share Posted September 11, 2007 Get your juggs ported. I wish you lived closer so you could ride my bike. Ported juggs are a night and day difference. Check out flotek, $380 for the portjob and flywheel lighening like i got. Plus a little extra for the new gaskets you have to replace. While you're at it, get him to mill your stock head. Done. No need for a pricey cool head. I can agree with this. I rode his bike and it is a night and day difference from mine, which has pipes, silencers, no lid K&N, and bored .60 over. His bike runs damn good for what he has done to it. It made me a believer in porting for sure. Quote Link to comment Share on other sites More sharing options...
sredish Posted September 11, 2007 Report Share Posted September 11, 2007 while i also agree that the carbs were not why he beat you, they are way too big for the stock bike. imo, they're too big for a stock ported bike. there's no reason, again imo, for a stock bore bike, ported or not, to go bigger than 30mm. Your losing a lot of lowend with that big of a carb, then you have the narrow power band eating away at your traction (hard fast hit) and making it harder for you to stay in power, where for a 4 stroke it's very easy. Sell the 35's, put your stockers back on or bore them to 28mm and use the money off the 35's to port your cylinders. You'll be way ahead of the game. Quote Link to comment Share on other sites More sharing options...
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