why dose my trike have more power

[bcredneck]

i swaped the head on the xr200 motor in my trike with a 185 head after i bent a valve in the mud now my trike has more bottom end power and revs faster without popping when i let off the gas
but its a smaller head i even had to use a file to match it to my intake so it would run without choke but after that it runs way better :wonderingwhat the h*!!

[torque]

if you were backfiring on decel you were running lean.

[tri again]

smaller head'space' could mean higher compression.
some sort of measuring device is typically used to
measure the amount of fluid that the inverted head will hold.
like, looking at the valve heads, how much liquid will the combustion chamber hold
compared to the old one.

Glad it runs and even better is good.

Different compression ratio make just have matched better with your old jetting.
We all deserve to be lucky once in a while.

[badass350x]

if you were backfiring on decel you were running lean.

That's not always the case!!! If your head pipe gasket was bad or leaking you can get a backfire!

[torque]

That's not always the case!!! If your head pipe gasket was bad or leaking you can get a backfire!

ok i can take some constructive criticism.

but bcredneck said the 185 head is smaller i assume he means the ports are smaller (had to file the the port to match thee intake) = less air to the same sized carb and jetting. that makes me think less air flow in the cc . now from what i understand the combustion chambers on the 185 and 200 head are the same size, so nothing else has changed but the volume of air into the engine.

that is why i suspect a lean condition in at least on phase of carb operation, if not the main then may be the needle.

just a thought

[fabiodriven]

Pay attention Torque. It's an XR200 motor.

I'm not extremely familiar with that motor, but I know it is very similar to the 185/200 motors. One thing I know is different for sure is the cam. I don't know if there is any difference in the port size or combustion chamber volume. It's tough to really comment when the OP gives such vague details. Also, knowing what this guy is capable of, he could have a carb off of an RC car on it or a 1000 CFM Holley on there. You just never know.

[just ben]

ok i can take some constructive criticism.

but bcredneck said the 185 head is smaller i assume he means the ports are smaller (had to file the the port to match thee intake) = less air to the same sized carb and jetting. that makes me think less air flow in the cc . now from what i understand the combustion chambers on the 185 and 200 head are the same size, so nothing else has changed but the volume of air into the engine.

that is why i suspect a lean condition in at least on phase of carb operation, if not the main then may be the needle.

just a thoughtthat symtom is a rich condition. The excess unburned fuel combusts in the exhaust. 9 of ten times its mixture screw adjustment.An air leak at the head helps with the problem since it gives extra air to the unburnt fuel

[torque]

Pay attention Torque. It's an XR200 motor.

I'm not extremely familiar with that motor, but I know it is very similar to the 185/200 motors. One thing I know is different for sure is the cam. I don't know if there is any difference in the port size or combustion chamber volume. It's tough to really comment when the OP gives such vague details. Also, knowing what this guy is capable of, he could have a carb off of an RC car on it or a 1000 CFM Holley on there. You just never know.

so it a 200xr motor with a 185 head. i agree that the cam is different ant the piston is a a 10.1:1 cr against the 200x 's 9.6:1 cr piston. now the op siad he had to file down the intake port to make the intake match.

so im paying attention what am i missing

[beets442]

+1 ben.........

[torque]

that symtom is a rich condition. The excess unburned fuel combusts in the exhaust. 9 of ten times its mixture screw adjustment.An air leak at the head helps with the problem since it gives extra air to the unburnt fuel

i disagree google it

[Thorpe]

They always run the best, and since this is bcrednecks trike... ITS ABOUT TO BLOW!!!!

[fabiodriven]

so im paying attention what am i missing

My apologies. I thought you were referring to his motor as an ATC engine. Obviously I mis-read something.

[just ben]

i disagree google itthe problem of the youth today. Google doesnt hold up to 20 years of wrenching.But then again everything on the internet is true. Did you hear about why kentucky fried chicken changed their name to KFC? Theres a video and everything!

[torque]

i do have just a bit of experience. in my humble opinion i have corrected the exact same condition on my big red and 200x by ritchining up the mixture in one case on the needle and in the other on the main.

so whats you qualifications.

[torque]

hey man just a theory. could very well be wrong just have not heard a strong argument yet.....

[just ben]

hey man just a theory. could very well be wrong just have not heard a strong argument yet.....Its bcrednecks so who knows what the problem is.as far as a strong argument I don't care to argue. the popping is caused by unburnt fuel igniting in the exhaust(fact,google it). If it were lean there wouldn't be unburnt fuel. Qualifications? dealing with these and other issues for 20 years.(and still learning)

[4cylinders]

hey, sounds like a blown head gasket on the 200. now it has a complete different head assembly. cam timing, smaller combustion chamber, etc..

[stoshu]

it was champs chicken up north:lol:

[bcredneck]

i forgot to mention im still useing the xr cam

[bcredneck]

the motor was totaly stock barley ridden the bike had a cracked frame i only put about 15 hours on it used to burn tan plugs there black now even with no air filter i will have to rejet after i get a filter but its still better than it was

[CRAZY70MAN]

the motor was totaly stock barley ridden the bike had a cracked frame i only put about 15 hours on it used to burn tan plugs there black now even with no air filter i will have to rejet after i get a filter but its still better than it was

Ahhh Ben is correct. Black plug=rich. Hey Torque google "Bedframe Atv's" and see if BCredneck pops up anywhere.lol lol Or maybe "Deathwish 399 hardtail trike" and you may be surprised. Just goofin BC......wouldnt be the same without your builds.... Sounds as if jetting is the issue though. You do have an exhaust on it right and not a stove pipe or something???

[whyzee]

Carb off an RC car or cbr1000...
So true Fabio and soooo funny! :lol:
What continues to amaze me is that you can actually get these things to run! Keep em coming! !!

[bcredneck]

its got the stock 185 pipe but i have a 200x bassani pipe and xr 200 head pipe i was planing on installing
http://a2.sphotos.ak.fbcdn.net/hphotos-ak-snc7/301906_2554071294030_1321358857_2961585_1798110304 _n.jpg

[Dirtcrasher]

Does it have a seat, gas tank or fenders?? :lol:

[whyzee]

They come after the air filter is installed

[bcredneck]

ya i had it apart for that pic
http://www.3wheelerworld.com/attachment.php?attachmentid=120827&d=1301439307

[badass350x]

Dam,,, Now the motors GONE!

[Chazz of Blades]

At least now he can sit on it and make 'Vroom Vroom' noises.

[whyzee]

Dam,,, Now the motors GONE!

Lmao!!!!!!!

[bkm]

Am I the only one that finds themselves sitting back and shaking their head in amazement after reading a bcredneck thread?

[whyzee]

Am I the only one that finds themselves sitting back and shaking their head in amazement after reading a bcredneck thread?
+2
But tell me how much we all love reading them! ! Bcredneck is an instant classic here. Hell we can probably coin a phrase after him for any "special" mods.

[Xpress]

Popping happens when an engine that is running RICH sends unburnt exhaust gasses out through the pipe. The pipe is more than hot enough to ignite these gasses, thus the popping. Rich condition.

[torque]

just wondering where the unburnt fuel in the pipe gets the o2 from needed for combustion.

[bcredneck]

Popping happens when an engine that is running RICH sends unburnt exhaust gasses out through the pipe. The pipe is more than hot enough to ignite these gasses, thus the popping. Rich condition. i know this is normaly right but it was jetted perfect when it was popping and its rich now with no popping