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Post by Bluefront on Apr 26, 2011 17:23:22 GMT -5
Actually I'm more concerned with better MPGs.....this device gives you the ability to adjust the A/F leaner or richer on the fly, by simply installing/removing one or both plugs. The plugs can be popped in there in heavy rains.....although I don't think the setup will be much affected by anything short of a real down-pour. As to a performance increase.....it sure feels successful after some testing. The stock opening (seen on the left) is very small on this 150....somewhat like a restrictor. I suspect with both new intakes unplugged, the system went about one main jet size leaner...in effect. Sound increase.....for sure. Cruising along it's not much different from stock. On a heavy acceleration, it sounds like a 250, maybe a 350. All your friends will be surprised.....tell them you got a new BBK. ;D With one opening plugged, you could drive through a Church zone without offending anybody...I suppose. All the plumbing parts from Home Depot cost $2.  After careful measuring, you drill two holes in your air box.  I had to shorten the snouts a little.....the dotted line. After more measuring I used epoxy to hold everything together.  A little plastic paint and I'm back on the road.   Obviously this mod could be adjusted to fit your own setup. I think it would fit nice on the usual 50cc GY6 airbox. Better than the usual air cleaner upgrade? Maybe.....you won't inhale any more crap than the stock setup. The setup can be returned to stock in seconds using the plugs. But best of all.....you can adjust the airflow leaner or richer in seconds, for test or other purposes. My own setup sounds like a new scoot now.....  |
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Post by Bluefront on Apr 30, 2011 5:00:46 GMT -5
Update....got about a hundred miles on the new setup. The performance increase is for real, going by a seat-of-the-pants feel.....hard to say if other scoots would respond the same. The arrow in this next photo points to the OEM opening to the air box...  If you didn't install the plumbing hardware, the total intake area would have increased 3X. If you drive around without the snouts installed, this scoot gets unacceptably loud.....try it yourself, before you finish the job. I didn't have to do any carb adjustments, which surprises me. The spark plug readings look the same as before this mod. It's a keeper..... |
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Post by jeepsteve92xj on May 1, 2011 20:19:24 GMT -5
I didn't pick up any plumbing supplies yet but I did open a pair of holes like you did.
I haven't rejetted yet. With nothing else changes, it wouldn't run past 4500prm loaded.
I covered the two holes with duct tape - anti-duct in this case - and it ran normally again. rejetting will make a difference.
Are you using something else for a filter other than a stock $35(?) filter? 3000 miles on the original, time to change it.
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Post by Bong on May 1, 2011 20:33:12 GMT -5
Great Idea Blue!!!! Some people just drill a few hols in the air box willy nilly. I like the addition of the PVC plumbing pipe. Seems like a lot of possibilities. Great work as usual!!!! |
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Post by Bluefront on May 2, 2011 2:59:42 GMT -5
I've got the stock paper air filter in there.....with the back "flame protector" plate removed. The thing has over 10K miles on it and was looking a little dirty. But...they can be cleaned. Spray a little window cleaner on the intake side, let soak in for maybe 30 seconds, then gently blow through the other side with an air compressor......that'll blow out all/most of the dirt, without harming the paper. Just don't over-do the cleaner, and don't blow too hard. Let it dry over-night.....mine looks like new after doing that. YMMV.....they cost $20 new. That jetting thing.....my carb was running a #107 MJ (two sizes bigger than stock) before this mod. That might explain why I didn't need to re-jet. I installed a new spark plug the other day.....taking plug readings. The old plug looked normal after running a while with this mod. This sort of mod is easy.....and can be undone with the plugs in my case, or with duct tape if you just drill holes. With the plumbing hardware on there, it looks OEM, and water/crap entry will be virtually eliminated. Oh....my 50cc GY6 scoot is much more sensitive to any airflow mods than this 150. I'd still be playing with the carb settings if I had done this mod to my Roketa 50. I still may need to change the MJ when the weather becomes hotter, but for now, the jetting seems perfect. I've got over 200 miles on it, including a fast run on the state highway over 60mi.  |
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Post by jeepsteve92xj on May 2, 2011 11:50:52 GMT -5
real 60mph?
Finally got my GPS mounted (waiting on a power cable), 70mph speedo indicated is 54mph GPS. WOT, down hill.
I did hit over 75 the other day by my GPS batter was dead.
The bike computer I was mounting only reads in Km/h, but I found an identicle one that is suposed ot be selectable miles or kilomoeters and °C vs °F - ordered and on the way from HK.
I really gotta rejet!
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Post by Bluefront on May 2, 2011 12:21:00 GMT -5
Heh....the trip was about 60 miles long, at my usual speeds of 45-55. This scoot will go over 60mph on the level....saw 61 GPS once (I've gone faster). But I rarely go that fast.....this is a scoot you know. |
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Post by jeepsteve92xj on May 2, 2011 13:52:33 GMT -5
Ahah! just another pony would be helpfull for the hills and wind.
I was watching the gps and speedo this am and up to 30 they were close enough. But they differe greatly and rapidly above that.
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Post by Bluefront on May 9, 2011 4:09:42 GMT -5
Update.....as I said in the OP, this mod was designed to help improve my MPGs ( around 57mpg during last summer). I've been doing a number of small mods and checking for mpg improvement between each. I'm beginning to see the results......after this last air-box mod, my mpgs have checked right at 70mpgs over the last few fill-ups. Quite an improvement. What did it? Yeah the mixture was leaned-out somewhat.....but the airflow got the biggest benefit IMO. There's a difference between those two things.....but the explanation is complicated. Could you get the same benefit with one of those after-market "performance" air-cleaners? Perhaps.....but if you notice in the ads for those things, no mention is made of improved mpg. Now if your own air-box setup is anything like mine, this mod may be your cheapest upgrade......one you can feel. |
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Post by jeepsteve92xj on May 9, 2011 12:28:37 GMT -5
Did you remove the canister when you removed the EGR? I do have a high flow filter to use, but haven't bothered to install it until I do the jets. It took me a while to find a little information on the vacuum lines to the carb, I know I have to have the slider and the petcock but wasnt sure where to pull vacuum from - 4-way T'ed to the manifold - the canister shares the 4-way vacuum. I still top out at 55 on the downhil. and this morning I managed 0 to 46 climbing a fairly steep grade -if I hit the bottom of the hill at 55 and a green light, I'll drop to 45 or less by the top -per the GPS) so hitting 46 today may mean I got a little ooompf from the EGR removal - and the appropriately sized fuel filter. The Honda SH150 airfilter looks just like the xingyue ita 150 except the filter itself is much larger - like this K&N version - nice picture www.knfilters.com/air_filter/honda_sh150.aspxin fact only $21 on bikebandit 2: ELEMENT, AIR CLEANER 2680813 (7985970-001) |
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Post by Bluefront on May 9, 2011 16:18:29 GMT -5
This Xingyue didn't have an EGR setup....it had a PAIR system, which is now completely removed.
Keep in mind the Honda SH150i has a fuel injection system, and uses a high pressure electric fuel pump. The fuel filter is no doubt designed for it. It's not a good idea to use such a filter on a gravity-fed system....like this model uses.
The Honda air filter does look like it should fit.....but you never know. If you get one please post about it.
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Post by jeepsteve92xj on May 9, 2011 21:17:44 GMT -5
I had a larger low pressure filter on since I had to change it in a rush last fall when the original backwards installed filter started leaking. Now I have in a tiny small engine filter.
It seems the PAIR is a lot like the EGR. Routing exhaust back to be re-burned/preheat the intake air.I left the canister on since there is a line I think from the fuel tank breather attached.
I have the one vacuum from the manifold near the head pulling three ways. If I was loosing too much vacuum through any of them Id probably have no slider activity or no fuel from the petcock.
I may just order the bikebandit SH150i air filter. Its relatively inexpensive.
I'd love to get the entire SH150i EFI setup but the prices are steep
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Post by D-cat on May 14, 2011 14:34:31 GMT -5
All PAIR does is force measured amounts of fresh air into the exhaust. It might actually have a positive emissions effect on exhausts with a catalytic converter but for a bike exhaust it's only function is to dilute the exhaust and trick the sensors into thinking the exhaust is cleaner than it is. It also makes backfiring more prevalent on aftermarket exhausts. It's useless on a bike and deserves nothing less than total elimination, IMO.
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