150cc X18 build

[ashar014]

Most of the work on my custom build is already done. Now all that is left is mounting a muffler to quiet it down. My bike has a straight pipe that ends just below the footpeg.
I have a stock muffler gutted by 125ccCrazy. There shouldnt be any restriction problems with this muffler.

Let me know what you think and if you think i can mount the stock muffler on a bracket off the tail section. where can i find these brackets?

[dna316]

nice job bro. hey a few questions where did you get the 150, how much did it cost and what kinda hp is it kicking out?

http://midbikenation.com/showthread.php?t=807&page=5
look at post 122 its rene13's bike
hopefully this helps.

[125ccCrazy]

Most of the work on my custom build is already done. Now all that is left is mounting a muffler to quiet it down. My bike has a straight pipe that ends just below the footpeg.
I have a stock muffler gutted by 125ccCrazy. There shouldnt be any restriction problems with this muffler.

Let me know what you think and if you think i can mount the stock muffler on a bracket off the tail section. where can i find these brackets?


That pipe is pretty low to do an upswept with hangers off the seat area....... That pipe should have started it's bend further forward... The way it is now those hangers will be really long.... I'd suggest a pit bike headpipe and mod that into an upswept that is unless you want the muffler really low on the bike...just my twocents

The bike looks killer so far...nice work for sure..

[dna316]

That pipe is pretty low to do an upswept with hangers off the seat area....... That pipe should have started it's bend further forward... The way it is now those hangers will be really long.... I'd suggest a pit bike headpipe and mod that into an upswept that is unless you want the muffler really low on the bike...just my twocents


hey 125 you say a pit bike pipe would be better to mod to do that upswept. can you point me in the right direction to where i can get one. id love to do that mod myself. i can bend the pipe and all just want to make sure the thing will fit my motor and all

[125ccCrazy]

hey 125 you say a pit bike pipe would be better to mod to do that upswept. can you point me in the right direction to where i can get one. id love to do that mod myself. i can bend the pipe and all just want to make sure the thing will fit my motor and all

I guess I should have said side exhaust and not upswept using the pitbike exhaust... The headpipe bends up and over the engine where it can be modded to run back and sweep up below the seat and tail section..

Ebay........http://cgi.ebay.com/ebaymotors/EXHAUST-PIPE-HONDA-XR50-CRF50-XR-CRF-50-125CC-PIT-BIKES_W0QQcmdZViewItemQQ_trkparmsZ72Q3a1205Q7c39Q3 a1Q7c66Q3a2Q7c65Q3a12Q7c240Q3a1318QQ_trksidZp3286Q 2ec0Q2em14QQhashZitem390000604631QQitemZ3900006046 31

[ashar014]

nice job bro. hey a few questions where did you get the 150, how much did it cost and what kinda hp is it kicking out?

http://midbikenation.com/showthread.php?t=807&page=5
look at post 122 its rene13's bike
hopefully this helps.

i got it from here:
http://cgi.ebay.com/ebaymotors/YX-150-CRF-50-Pit-bike-Mini-engine-KLX-top-end_W0QQcmdZViewItemQQ_trksidZp3286Q2em20Q2el1116Q QitemZ260218076362#ht_500wt_0

it was $425 shipped when i bought it

i would say it gets around 12 hp, its really strong none the less, pulls wheelies in 1st and 2nd

[ashar014]

That pipe is pretty low to do an upswept with hangers off the seat area....... That pipe should have started it's bend further forward... The way it is now those hangers will be really long.... I'd suggest a pit bike headpipe and mod that into an upswept that is unless you want the muffler really low on the bike...just my twocents

The bike looks killer so far...nice work for sure..

ive already invested in a low exhaust, so im kinda stuck there...
I like how rene's bike looks, do you think the bracket can hold the stock modded pipe u made for me?

would i have to match the same material to weld the extra bit it needs to reach? Also can i weld it on to the stock flange thats mounts to the muffler?
I think the material is stainless steel

let me get some more pics, ill be back in few

[dna316]

I guess I should have said side exhaust and not upswept using the pitbike exhaust... The headpipe bends up and over the engine where it can be modded to run back and sweep up below the seat and tail section..

Ebay........http://cgi.ebay.com/ebaymotors/EXHAUST-PIPE-HONDA-XR50-CRF50-XR-CRF-50-125CC-PIT-BIKES_W0QQcmdZViewItemQQ_trkparmsZ72Q3a1205Q7c39Q3 a1Q7c66Q3a2Q7c65Q3a12Q7c240Q3a1318QQ_trksidZp3286Q 2ec0Q2em14QQhashZitem390000604631QQitemZ3900006046 31

damn. k what i really want is the pipe to come out under the engine and bend out and up behind the right rearset

[dna316]

i got it from here:
http://cgi.ebay.com/ebaymotors/YX-150-CRF-50-Pit-bike-Mini-engine-KLX-top-end_W0QQcmdZViewItemQQ_trksidZp3286Q2em20Q2el1116Q QitemZ260218076362#ht_500wt_0

it was $425 shipped when i bought it

i would say it gets around 12 hp, its really strong none the less, pulls wheelies in 1st and 2nd


omg i want that engine bad. oh well i guess its time for a second job.

[ashar014]

here are a few more pics of the pipe mount and the flange i would use

[Supercharged]

good idea, i used the x18 flange for my upswept.

[dna316]

good idea, i used the x18 flange for my upswept.

hey super what pipe stock did you use?

[Supercharged]

i bought conduit, 3 inch exhuast, and bent and welded the whole exhaust...the only thing that was reused was the x6 header with flange, and the x18 flange

[dna316]

i bought conduit, 3 inch exhuast, and bent and welded the whole exhaust...the only thing that was reused was the x6 header with flange, and the x18 flange

3'' by 1/8th thick?

[Supercharged]

its just summit racing 3 inch exhuast pipe, not sure on spefics but its not thick to be heavy

the smallest quanity of materials were atleast 4 feet of exhaust and 12 feet for conduit

[dna316]

its just summit racing 3 inch exhuast pipe, not sure on spefics but its not thick to be heavy

the smallest quanity of materials were atleast 4 feet of exhaust and 12 feet for conduit


thanks bro. im looking it up right now. oh how much lenght did you need to do your new exhaust that went under the engine and out the side under the rearset

[Ghost Rider]

you can buy that for about 10$ for 10 feet at LOWES or HOMEDEPOT. Take a look at my thread, i bought a pit bike exhaust on ebay for $23 and then bought a mounting bracket for $5 and now i just have to rebend and weld it to fit the sidepipe.

[Ghost Rider]

http://midbikenation.com/showthread.php?t=1549

[Supercharged]

thanks bro. im looking it up right now. oh how much lenght did you need to do your new exhaust that went under the engine and out the side under the rearset


about 5 feet, and a big TIP on bending, weld caps on the ends with it full of sand.

the sand will keep form, heat up the backside of the inner bend you are trying to do.

its cake with 2 people twocents

[ashar014]

you can buy that for about 10$ for 10 feet at LOWES or HOMEDEPOT. Take a look at my thread, i bought a pit bike exhaust on ebay for $23 and then bought a mounting bracket for $5 and now i just have to rebend and weld it to fit the sidepipe.

can u give me the link for you mounting bracket and muffler

[Blitz$M.Inc.$]

does that say 'odu rowing'?
your in norfolk right?

[ashar014]

does that say 'odu rowing'?
your in norfolk right?

yea thats right,
im on the Old Dominion Rowing team, been rowing for 5 years

im a sophomore at ODU

[Blitz$M.Inc.$]

sweet, way to represent your squad man
you ride to school yet?

[ashar014]

sweet, way to represent your squad man
you ride to school yet?

haha, i live 3 blocks from school, but yea ive ridden it to work (at school) a few times.

just today i was riding it around the neighborhood for 10min and i get back home and this guy on a bike was following me. he says "you need an exhaust on that, if you ride again without one, i will call the cops"

hes right though, i just have a straight pipe now, i have to set my idle really high and i have no low end power.

i really want to get this muffler set up so i can get my license and legally ride in VA.

[Supercharged]

yeah atleast it isnt your crazy nieghbor screamin at you about tuning at 7 clock in the evening