| Author | Message | ||
     Jprovo |
OOPS Wrong section | ||
| Black_Lightning |
After quite a bit of searching, I still haven't been able to find a definitive answer as applied to the X1; so here go's: For intake upgrades there are essentially two versions that receive the most recommendations. The gutted airbox-K&N filter-venturi ring mod and the Force Intake. Now, I've read some things in the past that maximum torque, and where it lies within the RPM range, is dependant on intake runner length. I'm planning on purchasing the race ECM, D&D full system exhaust and the Force intake (because I hate that ugly airbox). Based on this set-up; where can I expect my greatest increase in torque, the midrange or top-end? | ||
| Aesquire |
I just ordered the K&N Filter from Sport twin. I'll pick up the Venturi from my local dealer, then play with tube / no tube etc. to pick what feels right & sounds best, sotp. That little house the filter lives in has to go, no way enough air gets through there. Ara, thanks for the pics. gives me more ideas on breather routing. Black_Lightning, my guess is midrange, but I'll let those with a clue answer that. | ||
| Ara |
Aesquire, I toyed with the notion of keeping the air filter shroud (my terminology) and drilling a bunch of holes in it - half-inch or better. It'd probably work and you might not be able to tell the difference except on a dyno, but heck I had a piece of alloy hanging around so why not. One thing I've noticed with my set up is that the bolts that hold the air filter in place tend to loosen, even with locktite. I eventually just drilled and safety wired 'em. You'll be happy with the K&N filter, I guarantee it. They have excellent factory support, BTW. I recently called the factory and told them that the rubber on the K&N filter on my Nissan 4x4 had turned to plastic and warped. They sent me a replacement, no questions asked. | ||
| Aesquire |
Good tip. I'll try aircraft nylocks. see cool toy on breather page. I sometimes miss working in a machine shop. On the other hand my bud Wulfstan has a forge. Hand forged twisted metal spring clip maybe? Middle ages solution would be leather strap.  Everything with an engine I own ends up with a K&N. | ||
| Blake |
Blacklightning, Either one will work well with no significant difference in peak torque characteristics. Does this help...  Factory Dyno of Stock versus Race Kitted X1 Lightning The exhaust is where you will find a big effect on performance. | ||
| Jasons1 |
Although I'm sure this has been asked before.....does anyone have anything good or bad to say about the "YoDude Performance" intakes. They look very similar to the Force Motor Products items, but I was wondering what you all thought. I have my own breather set-up that runs into a small K&N, so I'm just looking for the elbow, filter and gaskets. Anyone have any experience with their products? Thanks. - Jason | ||
| Cowtownbueller |
Jason, good question. I've looked at them myself. I could not tell by your profile what you rode, but I asked them if it would work on the DDFI Buells. I have a 2001 X1 and was concerned about the air intake sensor. They replied "The temp sensor slides into the filter and is clamped down by the filters clamp". I was wondering if this was the best to do that or if it was a quick fix? I was thinking drilling a hole in the back side of the elbow, like the hole in the top of the stock snorkel tub, wouldn't be better. Any thoughts anyone? Thanks, Paul | ||
| Djkaplan |
Blake, What does the dyno sheet you posted represent? Is it a stock X1 vs a Forcewinder equipped one? | ||
| Madav8tr |
I have a problem that I hope someone here will be able to help me with. Whenever I ride agressively(wheelies etc..) small droplets of oil drip from my airfilter onto my rear header. It isn't alot of oil but enough for me to notice the drops on my heat shield. What is causing this? Is this normal? I have a '97 S1 and the original airbox has been replaced with a small round K&N filter with a carbon fiber cover(like that when I got it so I don't know what the stock set-up looked like) and a Thunderslide kit is installed in the carb. The oil drips from the bottom of the filter. Any help is appreciated. BTW, I used the search feature before I posted this but it was difficult to get an answer that way. | ||
| Jim_Witt |
Charles, When you use the Search option, type this in exactly (with the double quotes included); "catch can" You can also click here and try this link. Cheers, -JW  | ||
| Ara |
Mad, you described your intake system well. What about the breathers? Do the breathers still feed into the intake? Likely, given your description. Go to the Knowledge Vault, click on Engine Breathers, and read everything there including the archives. More than likely it'll answer quite a few questions you haven't thought of asking yet. That's where Jim Witt's link takes you, but I recommend reading the Breather section from the beginning. | ||
| Madav8tr |
Thanks guys. I pulled the filter cover and mounting plate off to look at it and it appears that some sort of catch system has already been fabricated for it. The two hoses that come from the heads are routed back between the cylinders to a tee fitting and then it goes into what looks like a fuel filter. From there it returns to the intake and terminates in hole near the carb. There was a small amount(residue?) of oil/water in the opening near the carb. It may be stock but it doesn't look like it with the zip ties and all. Can I just route that last hose to an area away from the carb and fabricate a catch can for it or does serve some purpose where it's at? Thanks for listening to me and I hope I have described it properly. | ||
| Blake |
DJKaplan, The above chart is the Buell factory's dyno of a stock X1 versus a race kitted X1. Results for a DDFI S3 would be the same. Madav8tr, Your crankcase breather is spewing oil into your intake. What Mr. Witt said... You can mount a small catch can to help separate the oil from the recirculating crankcase vapors. | ||
| Ocbueller |
Madav8tr, Sounds like you may have a Spyke or Hayden type brand of crankcase breather added to your bike. Had one on my X1 when I got it used. I blame it for my blown crank seal. Lose it and follow any one of the number of suggestions the above posts indicated. Enjoy your S1, I love my 97 S1. SteveH | ||
| Ara |
Madav8tr, from your description it appears that your system is venting breather gases to the outside air via that filter, but breather liquids are going to the intake. You can easily put on a longer hose and attach a catch can, either purchased or home built. Your bike will thank you. Another option is a catch tube with a drain at the bottom. Several of us use clear 3/8 inch tubing with a brass fitting at the end to drain it. To mount it, just zip-tie it to the frame. I've found that polyethylene tubing (what you can get at Ace Hardware) will yellow over time. However, one of the BadWebbers recently told me that NAPA has clear tubing that's more durable. Russ | ||
| Madav8tr |
I had some clear tubing in the garage and I went ahead and connected it to the "filter". This replaced the tube that went to the carb. Anyway, I routed this down the frame and put a alrge brass bolt in the end to close it off. I zip tied in several places along the frame and put a zip tie to help hold the bolt in place(I had to put in with a wrench the fit was so tight and I don't think it will came out on it's own but it is a Buell so who knows). Is this sytem supposed to breath. The filter is a one-way deal so neither air nor fluid can get out once it's in. If I have screwed this up please let me know. It kinda sounds like what Ara is describing but I don't see where the air vents to the outside as the entire system seems to be sealed off. | ||
| Black_Lightning |
Blake, Thanks for the chart. I sure like the idea of the peak torque coming in sooner at 4500 RPM instead of 5700, plus more of it as well. | ||
| Ara |
Madav8tr, I don't understand what you said about the filter. It's got a one-way valve in it that prevents gases from escaping but lets them enter? That doesn't sound right to me, but if that's correct can you reverse the valve so that it lets gasses out and doesn't let anything enter? If you could post a photo it would help. BTW, you can get a little 3/8 inch brass fitting from your hardware store that has a hose nipple on one end and a little brass drain screw on the other - might be easier to drain than your bolt solution. Russ | ||
| Madav8tr |
The filter is a one way valve and it does let the gasses escape. I was unsure if the gasses were supposed to be recirculated or not. If not, is it safe to have the system sealed the way I do? | ||
| Ocbueller |
System needs to be able to breathe both ways, in and out. Can you post a pic of your filter? The Spyke that came on my X1 is an aluminum canister like a fuel filter with I believe two hose nipples on the same end. Others on this board may use them on their bikes, but I didn't care for the setup and went to stock. SteveH | ||
| Blake |
Ocbueller, Are you saying the crankcase needs to breath in? If so, you are mistaken. The umbrella valves in the rokerboxes are one way valves, only permitting exhaust, no intake. The crankcase does not need breath in, only exhale. What you may be meaning is that Madav8tr's filter, whatever it is, needs to be able to exhaust. With that I agree. | ||
| Reepicheep |
Blake... where does the air come from in the crankcase then? It can't always be going out. I figured the crankcase vent had to breathe both ways as well. Never measured it though. | ||
| Aaron |
It comes from the combustion chamber, past the rings. Blows right by. | ||
| Blake |
What Aaron said. Seepage of high pressure combustion gasses past the rings. | ||
| Reepicheep |
Thanks Aaron and Blake. Boy. The more you learn about this stuff, the less you realize you know. | ||
| Ocbueller |
If the umbrella valves were not in place, would it breathe both ways? I thought the motion of the pistons created some suction as well as pressure. SteveH | ||
| Hootowl |
Yes, it would breathe both ways, however, you don't want it to. Vacuum in the crankcase is a good thing. Helps to seal the rings. | ||
| Madav8tr |
One more question. With the airfilter set up that I use I get the smell of gasoline on me everytime I ride. I suppose this is because of the filter being porous a slight amount of fuel mist exits to the rear of the filter element and therefore ends up on my legs. Maybe the wind exerted on the front of the filter forces the fuel mist to the rear during riding. Is there a solution to this? Surely I am not the only one with this problem. BTW, thanks for the info on catch cans. I made one and it seemed to work really well. | ||
| Blake |
Madav8tr, If fuel mist is escaping from your carburetor/air filter, you have a SERIOUS problem. That should NOT be happening. |
