KRMit Posted April 19, 2004 Report Share Posted April 19, 2004 I've got the 35mm CV maifold kit from Trinity on it's way to me with VForce cages. I called up Trinity today for jetting advice and dude said the 35mm was way too big for my bike with stock compression. He said I should really get the head shaved or get an aftermarket one first. I asked if I could run this one in the meantime and he said I could, but it's gonna be fat. He suggested 190 mains and 52 pilots with the following mods: FMF pipes, Vforce cages, timing advanced 2 degrees, aftermarket filter He never asked my elevation and I forgot to tell him, but it's 500 feet. Do ya'll think I can still run it or is it just not gonna be right? Anyone wanna trade a 33mm carb for a 35mm? Quote Link to comment Share on other sites More sharing options...
fixitrod Posted April 19, 2004 Report Share Posted April 19, 2004 Try it out first. You may not be as unhappy as they think. Just sounds rich though but I know nothing about the cv systems. I would at least try it since you have it. You can take the head to a auto machine shop and tell them to take .030 inches off. $30 and a gasket you're all set. Quote Link to comment Share on other sites More sharing options...
KRMit Posted April 19, 2004 Author Report Share Posted April 19, 2004 Try it out first. You may not be as unhappy as they think. Just sounds rich though but I know nothing about the cv systems. I would at least try it since you have it. You can take the head to a auto machine shop and tell them to take .030 inches off. $30 and a gasket you're all set. That's all there is to it? What would that bring the compression up to? Quote Link to comment Share on other sites More sharing options...
sredish Posted April 20, 2004 Report Share Posted April 20, 2004 (edited) 35mm is not going to be too big. Look at my mods below and I run the 35 and it screeeaaaammmms. Wouldn't trade it for nothing. Then when you decide to port, compress and stroke, your one step ahead. And honestly, the compression isn't going to make much difference, it doesn't affect your air/fuel mixture, so you'll still be using the same amt. of fuel either way. Edited April 20, 2004 by sredish Quote Link to comment Share on other sites More sharing options...
dirtbike killer Posted April 20, 2004 Report Share Posted April 20, 2004 (edited) I think you will be fine with the 35mm. But I do think it would run better with the 33mm. Before I had porting my ran better with a 33mm. The 35mm was a little flat up top compared to the 33mm. The 33mm was a little more snappy on the bottom end, and would really scream out 6th gear. The 35mm was also more tempermently, and would run a lot better some days, and not others. The 33mm ran basiclly same all the time. I would keep the 35mm though, because as you add more mods it will be the better carb. P.S. I think anyone getting a 2 into 1 setup should get the 35mm, because you will grow out of the 33mm quick! Edited April 20, 2004 by dirtbike killer Quote Link to comment Share on other sites More sharing options...
KRMit Posted April 26, 2004 Author Report Share Posted April 26, 2004 I just got the carb in from the guy and it has a 175 main and 48 pilot. That seems odd to me since the guy was supposed to have all kinds of MX mods done. Anyway, is it safe to crank and check the jetting with that or is it too lean? Quote Link to comment Share on other sites More sharing options...
dirtbike killer Posted April 26, 2004 Report Share Posted April 26, 2004 If its a 33mm that sounds about right, I would run it and check your plugs. If its a 35mm thats to small, I would start with a 195 and go from there. As far as his mods, I didn't really change to much on my carb after my porting. Quote Link to comment Share on other sites More sharing options...
sredish Posted April 27, 2004 Report Share Posted April 27, 2004 (edited) If its a 33mm that sounds about right, I would run it and check your plugs. If its a 35mm thats to small, I would start with a 195 and go from there. As far as his mods, I didn't really change to much on my carb after my porting. Agreed. You'll most likely want the needle in the 4th clip from the top unless your at a pretty high elevation, so you might change that before you run the WOT for the main. I'd bet money that it's in the 3rd from the top/blunt end. Edited April 27, 2004 by sredish Quote Link to comment Share on other sites More sharing options...
KRMit Posted April 27, 2004 Author Report Share Posted April 27, 2004 If its a 33mm that sounds about right, I would run it and check your plugs. If its a 35mm thats to small, I would start with a 195 and go from there. As far as his mods, I didn't really change to much on my carb after my porting. Agreed. You'll most likely want the needle in the 4th clip from the top unless your at a pretty high elevation, so you might change that before you run the WOT for the main. I'd bet money that it's in the 3rd from the top/blunt end. The needle clip position affects a WOT plug check? Quote Link to comment Share on other sites More sharing options...
sredish Posted April 27, 2004 Report Share Posted April 27, 2004 Agreed. You'll most likely want the needle in the 4th clip from the top unless your at a pretty high elevation, so you might change that before you run the WOT for the main. I'd bet money that it's in the 3rd from the top/blunt end. The needle clip position affects a WOT plug check? Well, not directly but.... One clip on the needle is equal to about one/half of a main size. So if you get the main dialed in perfectly and then move the needle two clips richer, then your also putting more fuel to equal going up one size in the main, which could affect your WOT jetting. What you could do is allow for this and don't get your main too rich and then adjust your needle afterwards if need be. Just something to keep in mind. But I do believe your machine will run better with the needle in the 4th clip from the top. For instance, mine is in the 5th, and I don't have any internal mod, and the single carb setup is key to have the needle dialed in for the midrange you bought the kit for. Quote Link to comment Share on other sites More sharing options...
KRMit Posted April 27, 2004 Author Report Share Posted April 27, 2004 Well, I don't mind rejetting this thing so much anyway. With the dual setup I had to take the quad halfway apart just to get in the carbs. Quote Link to comment Share on other sites More sharing options...
sredish Posted April 27, 2004 Report Share Posted April 27, 2004 Well, I don't mind rejetting this thing so much anyway. With the dual setup I had to take the quad halfway apart just to get in the carbs. Heard that, this Keihen is a piece of cake to rejet. If you get some allen bolts for the bottom of the float bowl like I did, you don't even need to twist the carb to the side to get in there, plus you won't wear out the phillips bolts. Quote Link to comment Share on other sites More sharing options...
KRMit Posted April 27, 2004 Author Report Share Posted April 27, 2004 Heard that, this Keihen is a piece of cake to rejet. If you get some allen bolts for the bottom of the float bowl like I did, you don't even need to twist the carb to the side to get in there, plus you won't wear out the phillips bolts. What a thought! You're a genius! Would you happen to know how to get the airbox on? Quote Link to comment Share on other sites More sharing options...
phonebem Posted May 4, 2004 Report Share Posted May 4, 2004 Ok this one caught my eye, I was looking at getting the 35mm CV kit for mine with a Stage IV pipe. Would I have a problem with it being too fat with this setup; K&N filter pod w/Outerwears, Boysen Rad Valves, stock porting (may get porting in the future), Cool Head w/18cc domes all running at about 4800ft in elevation almost entirely in the dunes. I wanted to error on the big side, but with guys having problems with it being too fat at like 600ft eleation, I'd hate to see it 3/4 of a mile higher... Quote Link to comment Share on other sites More sharing options...
KRMit Posted May 4, 2004 Author Report Share Posted May 4, 2004 Ok this one caught my eye, I was looking at getting the 35mm CV kit for mine with a Stage IV pipe. Would I have a problem with it being too fat with this setup; K&N filter pod w/Outerwears, Boysen Rad Valves, stock porting (may get porting in the future), Cool Head w/18cc domes all running at about 4800ft in elevation almost entirely in the dunes. I wanted to error on the big side, but with guys having problems with it being too fat at like 600ft eleation, I'd hate to see it 3/4 of a mile higher... I still haven't gotten the jetting in just right so I can't really tell you for sure if it's too fat or not, that's just what Trinity said. I can tell you the midrange kicks in hard and strong though. I'm just having a hard time with the pilot and main. Quote Link to comment Share on other sites More sharing options...
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