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Motorized Bicycle Trouble Shooting Use this area to post problems that may arise that you could use some help in figuring out what is wrong with their bicycle motor and what needs to be done to achieve top performance.

Modified intake......


Discussion at Motorized Bicycle Engine Kit Forum in the Motorized Bicycle Trouble Shooting forum. I was wondering.....if anyone else had an issue with a modified intake which was neccessary on a frame such ...
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Old 09-10-2009, 12:39 AM
Salty Gator's Avatar
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Default Modified intake......

I was wondering.....if anyone else had an issue with a modified intake which was neccessary on a frame such as mine.....so far I've seen one other person whom has the same bike and he also had to stretch the intake out and make it a side draft......off the line it sucks !....however......once you're going....it * Screams *........I've clocked a 34 MPH on a 49cc motor....which I don't think is cool....( blow it up ? )....does anyone think a 45 degree piece of electrical conduit might suffice ....or am I asking for even more issues ?... hit me up y'all ?.....

Thanks,
Salty
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modified-intake-intake-scream.jpg  modified-intake-test-image.jpg  
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Old 09-10-2009, 12:59 AM
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Default Re: Modified intake......

I have the same issue with mine, I'm going to be trying a smaller carb off a pocket bike, it's the same bore size but has no float, kinda like a weed eater carb, just waiting for it to show up in the mail.
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Old 09-10-2009, 01:08 AM
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Default Re: Modified intake......

i love the fit of the motor in that bike. nice and compact
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Old 09-10-2009, 01:23 AM
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Default Re: Modified intake......

Quote:
Originally Posted by buzzkill View Post
I have the same issue with mine, I'm going to be trying a smaller carb off a pocket bike, it's the same bore size but has no float, kinda like a weed eater carb, just waiting for it to show up in the mail.
would you please keep me informed as to how well it performs ?....I also thought of a weed eater carb and came upon the conclusion....the Shindaiwa carb has the EXACT same air cleaner.......design or insanity ?

Thanks,
Salty
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Old 09-10-2009, 01:28 AM
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Default Re: Modified intake......

Quote:
Originally Posted by buzzkill View Post
I have the same issue with mine, I'm going to be trying a smaller carb off a pocket bike, it's the same bore size but has no float, kinda like a weed eater carb, just waiting for it to show up in the mail.
Can you let me know if it works correctly ?...I swear I'm at my wits end.....off the line the accellaration sucks !.....sometimes I even have to pedal the ***** to keep going.....HELP !

Thanks,
Salty
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Old 09-10-2009, 05:13 AM
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Default Re: Modified intake......

I just posted this in another thread lol but;

I had a very similar problem with carb clearance on my frame, I found simply cutting the intake manifold would allow me to rotate it - changing the angle and canting it to the side. You need be careful however as if it's an aluminum intake, it's nearly a 1/4 inch thick sidewall and if the two halves aren't flush it will interrupt the flow and collect fuel. If it's a steel one, the step is so marginal it really doesn't matter much.

Another concern to be wary of is vibration, should you choose to extend the manifold - be careful to mount it (carb) securely to keep the shaking down, frothed fuel is not going to help performance lol






*My carburetor is more level than it appears in this pic - my camera was held by a slightly crooked person heh
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Old 09-10-2009, 11:21 AM
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Default Re: Modified intake......

Quote:
Originally Posted by Salty Gator View Post
Can you let me know if it works correctly ?...I swear I'm at my wits end.....off the line the accellaration sucks !.....sometimes I even have to pedal the ***** to keep going.....HELP !

Thanks,
Salty
You want your cake and eat it to? yeh me to. if it goes good up top expect it crap down low. maybe get a smaller rear sprocket.
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Old 09-10-2009, 12:08 PM
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Talking Re: Modified intake......

Quote:
Originally Posted by BarelyAWake View Post
I just posted this in another thread lol but;

I had a very similar problem with carb clearance on my frame, I found simply cutting the intake manifold would allow me to rotate it - changing the angle and canting it to the side. You need be careful however as if it's an aluminum intake, it's nearly a 1/4 inch thick sidewall and if the two halves aren't flush it will interrupt the flow and collect fuel. If it's a steel one, the step is so marginal it really doesn't matter much.

Another concern to be wary of is vibration, should you choose to extend the manifold - be careful to mount it (carb) securely to keep the shaking down, frothed fuel is not going to help performance lol






*My carburetor is more level than it appears in this pic - my camera was held by a slightly crooked person heh
Dang !......that looks like a solution and I happen to have a spare intake pipe......( I know what I'm going to do today )


Laters,
Salty
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Old 09-13-2009, 10:17 AM
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Default Re: Modified intake......

Quote:
Originally Posted by Salty Gator View Post
Dang !......that looks like a solution and I happen to have a spare intake pipe......( I know what I'm going to do today )


Laters,
Salty
buy a steel intake and do the same thing and weld it...good luck...Dennis
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Old 09-13-2009, 10:46 AM
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Default Re: Modified intake......

buy a steel intake and do the same thing and weld it...good luck...Dennis



Dennis....where do I procure a steel intake ?

Thanks,
Salty
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