A friend built this intake for me and the main problem is that the intake tube for the left cylinder is way shorter than the right. Consequently, the left cylinder is running richer than the right. Without remaking the intake, I shoved a piece of 1" id. gas tubing inside the right intake, trying to decrease volume and increase fuel in the right cylinder. It fit snugly inside and did help. Then I got the bright idea of making an intake gasket with a 3/4 hole in the intake gasket on the right side, didn't have a huge effect, but still didn't cure the problem. May not be good for the engine either. I'd posted my bike earlier, but I'll throw in a more recent pic. The bike flies with the 40mm Lectron, but it won't pass emissions here in AZ, due to the minor imbalance in the fuel flow. I did check the compression and had close to 150 in both cylinders. Anyway I thought I'd throw this out and see if anyone has any advise.
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2 into 1 Intake crossover
- Thread starter bearcat
- Start date
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- Tags
- carburetors
That would be to easy and nothing about this has been easy. I've had to learn the hard way a few times on this, my 1st build. I'd have to scrap the exhaust and not willing to go there yet. I'll figure it out 1 way or the other. I hoping for something I don't already know?
sherwin
XS650 Addict
Shit man that is a nice looking ride !!!
I know nothing really about the 2 to 1 intake except that the only one I would use is made by joewiseguy, for sale on ebay and I think also has a web site, this is the only consistent maker of these intakes I have seen.
Again, that's a fucking nice looking bike.
I know nothing really about the 2 to 1 intake except that the only one I would use is made by joewiseguy, for sale on ebay and I think also has a web site, this is the only consistent maker of these intakes I have seen.
Again, that's a fucking nice looking bike.
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Thanks for the comments. I've seen those intakes and came close to buying 1. I wanted to do this myself. Always going to learn a lesson from it. It runs out like bat out of hell, but just doesn't idle perfect, especially on the richer side of the intake. I'd love to try his just to see the difference $$? Not be critical of his design but didn't want it sticking out at all if I could help it
Hey bearcat,
This reminds me of Harley manifold experiments.
How about a small flow diverter/vane, on the left side, between the carb and the 'Y'?
It would bias the flow to the right side, and make the left appear as a longer path.
This reminds me of Harley manifold experiments.
How about a small flow diverter/vane, on the left side, between the carb and the 'Y'?
It would bias the flow to the right side, and make the left appear as a longer path.
Honestly, outside of remaking the whole thing, that is probably the last best option. I had thought of it before I started down the path of restricting the longer side. That makes more sense because the short side is more of a straight shot, which is making things worse. I'd never heard of the Harley experiment, but I am going to give it a shot. I'll let you know how it goes. Thanks for your comment
You know, back then, 'posting pics' didn't exist, that would've been science fiction stuff. Somebody may have some old polaroids, not sure. However, deflection vane experiments for creating 'stratified swirl' may have pics online. One book I have (from 1962) has 'swirl stratified' in the title, could be out there. You're entering 'experiment land', do what makes sense to you, as long as it doesn't get sucked into the engine...
ogh11756
Project Hound
itrguy
XS650 Addict
I run a wiseguy 2 into 1 with a vm36. Bike runs great, one kick bitch and pulls super hard!! Haters gonna hate...
ogh11756
Project Hound
When the time comes, i am getting his street tracker 2:1.
Did you have any problems getting it dialed in?
Or did Joe give all required set up info?
Let them hate, it's all they got
ogh11756
Project Hound
Wiseguy makes & sells 2:1 intakes and is a member here.
He may reply and share some of his hard earned knowledge with you, not sure.
I hope you get it worked out.
Cool, good luck
itrguy
XS650 Addict
Worth a shot.... Good luck!
coughing skunk
XS650 Addict
Seriously though, let's consider the real problem. Arizona is emissions checking a ~40 year old motor?? Really?
Yeah! Here in Texas, I'm grandfathered, no test. What are you Arizona boys up to?
No doubt it sucks. Arizona passed the legislation to do away with emmisions on motorcycles completely several years ago and they won"t enact it. Something to do with loosing funding by the EPA standards. Bunch of low life's. Supposed to be gone by the end of this 1st quarter, that came and went? Your going to get me started. I wouldn't have even screwed with the intake. It wasn't that noticeable. Now I'm all ticked about that again, crap..........
Cross overs are a band-aid for what ails a inefficient runner design of unequal lengths that transmit poor fuel distribution amongst the cylinders
