burhead Posted June 14, 2011 Report Share Posted June 14, 2011 Over the winter I installed a set of R2s and I was pretty impressed initially. I had only ridden the quad on hardpack or gravel with my 20" kenda claws. I took it to a local riding spot for a weekend trip. The riding area is all sand with alot of tight trails and some nice wide open spaces. I am running 22" pro wedges (also new over the winter). I am geared down one tooth on the front sprocket. This thing is terrible in the sand. I cannot get it to launch no matter what I try. It is also not alot of fun on the trails. My reason for the taller paddles was to gain some ground clearance as some of the trails get some pretty deep ruts. I figured that my gearing was low enough to compensate for the taller paddle also figured that these tires being so light would help out as well. So I am wondering what guys are running with these pipes. Quote Link to comment Share on other sites More sharing options...
Coupelx Posted June 14, 2011 Report Share Posted June 14, 2011 they are very picky about jetting and are definately not a tight trails pipe. Quote Link to comment Share on other sites More sharing options...
SuperMex Posted June 14, 2011 Report Share Posted June 14, 2011 Get your jetting dialed in perfect, I ran T-5s and R-2s come on just as soon and pull way harder and rev out longer than T-5s. They are a mid-top pipe but I ride in trails and have no problems, what kind of port job do you have? and other mods? Quote Link to comment Share on other sites More sharing options...
toytech Posted June 14, 2011 Report Share Posted June 14, 2011 one less tooth on the front is not enough for that tire size,ad three teeth to the rear sprocket. I love the way theese pipes work all around on my banshee. Quote Link to comment Share on other sites More sharing options...
burhead Posted June 14, 2011 Author Report Share Posted June 14, 2011 The only other mods I have are +4 timing and milled head. I think I am pretty good on the mains. I am at 330 same as I was with my FMF fattys. I didn't mess with the needles because it felt alright when I was rippin around the yard. I also had my pro wedges mounted backwards I guess. I put them on with the scoops facing forward like a normal paddle but according to the arrows on the tire this is wrong. I ll probably try a larger sprocket and see what that does for it. It sucks because all of our sand riding areas are currently engulfed my the missouri river and I would like to get this sorted out before the fall rally in genoa. Quote Link to comment Share on other sites More sharing options...
toytech Posted June 15, 2011 Report Share Posted June 15, 2011 (edited) The only other mods I have are +4 timing and milled head. I think I am pretty good on the mains. I am at 330 same as I was with my FMF fattys. I didn't mess with the needles because it felt alright when I was rippin around the yard. I also had my pro wedges mounted backwards I guess. I put them on with the scoops facing forward like a normal paddle but according to the arrows on the tire this is wrong. I ll probably try a larger sprocket and see what that does for it. It sucks because all of our sand riding areas are currently engulfed my the missouri river and I would like to get this sorted out before the fall rally in genoa. I had to go up 3 jet sizes from the fmf pipes to the R2s if I were you I would do a plug chop to check jetting Edited June 15, 2011 by toytech Quote Link to comment Share on other sites More sharing options...
SuperMex Posted June 15, 2011 Report Share Posted June 15, 2011 X2 I agree with Toytech I think you should be going bigger on your Main plug chop and check to make sure. Quote Link to comment Share on other sites More sharing options...
burhead Posted June 15, 2011 Author Report Share Posted June 15, 2011 I did a plug check. I think I was a bit rich with the fattys. Plug was always dark brown like milk chocolate. Plug was more of a greyish black when I checked it after a few wide open runs. I guess I will try throwing the dirt tires back on it and bump the main up few sizes and see what she does. So what jetting are you guys ending up with? Quote Link to comment Share on other sites More sharing options...
SuperMex Posted June 15, 2011 Report Share Posted June 15, 2011 I did a plug check. I think I was a bit rich with the fattys. Plug was always dark brown like milk chocolate. Plug was more of a greyish black when I checked it after a few wide open runs. I guess I will try throwing the dirt tires back on it and bump the main up few sizes and see what she does. So what jetting are you guys ending up with? I am at Sea level in SoCal I am running 168 mains, 50 pilot, CEJ needle on the middle clip, 2 turns out on my A/F screw, Keihin 34mm PJ carbs, V-Force reeds, Dune Port, 50/50 Gas @55to1 Klotz Supertechniplate hope this helps. Quote Link to comment Share on other sites More sharing options...
toytech Posted June 15, 2011 Report Share Posted June 15, 2011 I did a plug check. I think I was a bit rich with the fattys. Plug was always dark brown like milk chocolate. Plug was more of a greyish black when I checked it after a few wide open runs. I guess I will try throwing the dirt tires back on it and bump the main up few sizes and see what she does. So what jetting are you guys ending up with? use the search option and look for plug chop, looking at plugs after a few runs is not acurate enough. Quote Link to comment Share on other sites More sharing options...
sleeper06 Posted June 15, 2011 Report Share Posted June 15, 2011 No porting sea level should be about 300 mains with those pipes stock pilot,do you have an air box?i have found those pipes to work in tight trails but even with the fattys you were real fat,280 mains with fattys Quote Link to comment Share on other sites More sharing options...
J-Madd Posted June 16, 2011 Report Share Posted June 16, 2011 Over the winter I installed a set of R2s and I was pretty impressed initially. I had only ridden the quad on hardpack or gravel with my 20" kenda claws. I took it to a local riding spot for a weekend trip. The riding area is all sand with alot of tight trails and some nice wide open spaces. I am running 22" pro wedges (also new over the winter). I am geared down one tooth on the front sprocket. This thing is terrible in the sand. I cannot get it to launch no matter what I try. It is also not alot of fun on the trails. My reason for the taller paddles was to gain some ground clearance as some of the trails get some pretty deep ruts. I figured that my gearing was low enough to compensate for the taller paddle also figured that these tires being so light would help out as well. So I am wondering what guys are running with these pipes. Are you launching in 1st or 2nd? I don't think your main jetting is that far off, and if it was it wouldn't drastically affect the way the bike launches. And most do run the pro wedges/4 snows backwards. FYI. Quote Link to comment Share on other sites More sharing options...
burhead Posted June 16, 2011 Author Report Share Posted June 16, 2011 I am launching in first. Are you saying that they mount them backwards from what the direction arrow says. I didn't even notice the arrows when I mounted them. I just figured that the scoops would face the same way as a normal sand paddle. I think if anything the needle is my problem. WOT seems fine but I may drop a jet size or two just to see what it does. Quote Link to comment Share on other sites More sharing options...
gotta_goatsfast Posted June 16, 2011 Report Share Posted June 16, 2011 Per Tom Borrink, the pipes were designed to work with an exhaust port duration in the area of 198-200 degrees on a mid-displacement sized motor (like a 421). They're designed to evacuate more spent gasses than a t5 or fatty. I never ran them on a stock port 350 so I don't have any personal experience, but on my 421 serval the R2s destroyed the t5s in top end and carried out the over-rev way further after the T5s signed off. They also pulled on sooner and smoother (more traction with a smoother hit). They are really close to the CPIs I tried but the R2s come one a little sooner and and have better torque "below the pipe" while still revving out just like a CPI. My guess is there just isn't enough motor behind them with a stock 350. Its a similar concept to when guys run huge duration solid camshafts in their small block with headers and a huge carb with single plane intake manifold... but run stock heads. It usually sounds bad ass but the motor cannot pass enough air to make use of the "go-fast" parts and they end up with a motor that makes little torque to launch and wheezes on the big end. As far as jetting goes, I found my engine likes a lean pilot jet compared to other pipes. I'm running a 45 pilot in my 35mm PWKs. Quote Link to comment Share on other sites More sharing options...
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