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Post by encephalon on Jul 16, 2015 12:40:28 GMT -5
Very cool info man, thanks. Might as well go to a 150cc carb as well right??? JK. I try the 150cc intake and 24mm 150c carb and the carb is to big for that size valve head. shots flames 7-8 inch out the pipe Cool thanks for the info. I'll just try and port match for now. Lol. |
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Post by Availien on Jul 16, 2015 17:48:14 GMT -5
Very cool info man, thanks. Might as well go to a 150cc carb as well right??? JK. I try the 150cc intake and 24mm 150c carb and the carb is to big for that size valve head. shots flames 7-8 inch out the pipe What size valve head were you using? Was it the stock one or the bigger upgrade? |
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Post by Kick start on Jul 16, 2015 18:34:11 GMT -5
stock head the biggest size that work with the stock head is a 22mm that I had on my last build.
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Post by Availien on Jul 16, 2015 19:53:41 GMT -5
I think with that bigger valve head he has the 150cc carb would work. The intake port is almost identical in size to a 150. The exhaust valve is 22mm and intake is 23mm on the head he's got in that kit.
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Post by encephalon on Jul 16, 2015 20:47:13 GMT -5
Finished installing the kit tonight. Pretty easy and straight forward. I'll have to do some port matching. The intake manifold and spacer are WAY off and it bugs the crap out of me. Also have to put some fresh oil in. It's late and my room mate is sleeping so I can't use the dremel. My muffler is really loud so I don't want to wake the neighbors. So that makes me have to wait until tomorrow for first start up. bollocks. I have the same head. I also had the same skin crawling irritation from the port not matching the intake manifold and spacer gasket. My solution: www.ebay.com/itm/161718008271?_trksid=p2057872.m2749.l2649&ssPageName=STRK%3AMEBIDX%3AITwww.ebay.com/itm/130973140607?_trksid=p2057872.m2749.l2649&ssPageName=STRK%3AMEBIDX%3AITMatched the hole in the valve head almost perfect. Tried the dremel on the stock spacer gasket first and cracked it. The carburetor didn't fit in the manifold right. It's a little over sized. So I took the clamp off of the old manifold and used that instead. Worked perfect. So I started it up for the first time today. It starts, but it idles like crap and dies out. Have to turn the idle screw ALL the way out just to keep it running. Too lean obviously. So I started looking around trying to find the reason and noticed my intake manifold spacer had cracked and broken from port matching just like you said  . That explains why it's running like crap probably, huh? Guess I'll be ordering that 150cc manifold and spacer after all. Thanks for the links once again lol. |
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Post by niz76 on Jul 16, 2015 22:18:37 GMT -5
If you have to turn the idle screw all the way in like that you might want to check your idle jet and be sure it's not clogged. With the idle screw screwed that far in, you might be running on what fuel the needle lets by. This is based on a similar scenario I ran into recently...
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Post by encephalon on Jul 17, 2015 0:12:06 GMT -5
If you have to turn the idle screw all the way in like that you might want to check your idle jet and be sure it's not clogged. With the idle screw screwed that far in, you might be running on what fuel the needle lets by. This is based on a similar scenario I ran into recently... Thanks I'll check it out as well just in case. But, I'm pretty sure my problem is an air leak problem. |
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Post by Availien on Jul 17, 2015 8:45:56 GMT -5
Make sure you get a paper gasket to match. That plastic spacer gasket doesn't come with one. Or you can use a very small amount of high temp gasket maker like I did. The port holes on that spacer gasket and manifold match the scorpion BVH perfect. The carburetor won't fit though. Like I said before, I just used the hose clamp off of the smaller OEM manifold to make a tighter squeeze. Make sure the rubber doesn't get all bunched up when you tighten it down. I put the manifold and carburetor together first, and then installed it on the bike. Easier to see what's going on at the connection point.
You may need to get a bigger jet as well.
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Post by Availien on Jul 17, 2015 8:51:43 GMT -5
So I started it up for the first time today. It starts, but it idles like crap and dies out. Have to turn the idle screw ALL the way out just to keep it running. Too lean obviously. So I started looking around trying to find the reason and noticed my intake manifold spacer had cracked and broken from port matching just like you said . That explains why it's running like crap probably, huh? Guess I'll be ordering that 150cc manifold and spacer after all. Thanks for the links once again lol. |
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Post by encephalon on Jul 18, 2015 0:48:07 GMT -5
I think I might need a bigger pilot jet. #38-40 is the way to go for all these mods right? Might try a #38. Made an intake manifold spacer out of a cutting board. Still have to check if its seating right. Frustration! I really want to feel this BBK powa!
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Post by iwiketuddlz on Jul 18, 2015 5:43:55 GMT -5
I have a new 150cc manifold and spacer make an offer!!! Brand new sir
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Post by Availien on Jul 18, 2015 7:57:54 GMT -5
I think I might need a bigger pilot jet. #38-40 is the way to go for all these mods right? Might try a #38. Made an intake manifold spacer out of a cutting board. Still have to check if its seating right. Frustration! I really want to feel this BBK powa! #40 PJ, #95 MJ is what I run in mine and it's a 47mm piston. |
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Moat
Scoot Member
Posts: 88
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Post by Moat on Jul 18, 2015 9:22:18 GMT -5
Made an intake manifold spacer out of a cutting board. Cutting boards are typically polyethylene or polypropylene, and will soften/melt from the heat of normal operation - and likely fail. Better to use a proper (hi-temp plastic) manifold insulator, or make one from a block of micarta/phenolic. Bob |
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Post by encephalon on Jul 18, 2015 11:35:53 GMT -5
I think I might need a bigger pilot jet. #38-40 is the way to go for all these mods right? Might try a #38. Made an intake manifold spacer out of a cutting board. Still have to check if its seating right. Frustration! I really want to feel this BBK powa! #40 PJ, #95 MJ is what I run in mine and it's a 47mm piston. Thanks for the info. I'm all but positive I need a bigger pilot jet for the BVH. I threw the stock head back on, and it started right up and idled just fine. |
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Post by encephalon on Jul 18, 2015 11:37:27 GMT -5
Made an intake manifold spacer out of a cutting board. Cutting boards are typically polyethylene or polypropylene, and will soften/melt from the heat of normal operation - and likely fail. Better to use a proper (hi-temp plastic) manifold insulator, or make one from a block of micarta/phenolic. Bob Thank you for the heads up! I'm using this spacer as more of a band-aid till the proper one comes in. I'll definitely keep an eye on it. |
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