a little exhaust performance, was it a bad idea?

cpimp · Post by **cpimp** » Fri Oct 14, 2005 10:06 pm

hello new cyber friends! i recently aquired an 87 Honda Elite 50 and its been running alright. Today I was hoping to gain some performance by freeing up some exhaust flow, but I didn't know what to do. I ended up putting a couple washers on the bolts where the exhaust attaches to the engine and the result was a much louder and slightly faster (2-3mph) scooter.

But is this bad?? What are the potential downfalls of such a primitive mod?

vette76 · Post by **vette76** » Fri Oct 14, 2005 10:15 pm

on a 2stroke the engine requires some back pressure. doing a mod such as this may lean out the engine. i reccommend checking the plug. should be a light tan color.

cpimp · Post by **cpimp** » Sat Oct 15, 2005 1:51 am

i'm pretty lost on what "the plug" is?? any help?

MaskedJellybean · Post by **MaskedJellybean** » Sat Oct 15, 2005 2:17 am

the spark plug, I believe.

vette76 · Post by **vette76** » Sat Oct 15, 2005 12:37 pm

yes, the spark plug is what i meant.

Post by **noiseguy** » Sat Oct 15, 2005 4:12 pm

... If you want to free up some backpressure, drill the exhaust around the exhaust outlet with 2-4 holes, 1/4" diam. You'll need about 6" of bit to do it.

Don't continue running it the way you've done it, you're asking for problems.

cpimp · Post by **cpimp** » Sat Oct 15, 2005 6:39 pm

i reattached the exhaust to normal configuration but it is still idling a bit rough. It doesn't really bother me and maybe it'll smooth itself out a little.

darat · Post by **darat** » Sun Oct 16, 2005 1:20 am

i am still going with a new plug it will make a big difference.

cpimp · Post by **cpimp** » Sun Oct 16, 2005 2:09 am

every once in a while when I'm crusing the throttle will just cut out and become completely unresponsive. It then coasts until the engine dies then it takes about 40 minutes of rest to start back up. Might this have anything to do with the spark plug??

Post by **noiseguy** » Sun Oct 16, 2005 9:54 am

That sounds like overheating. Is your oiler working, and fan attached?

cpimp · Post by **cpimp** » Tue Oct 18, 2005 11:29 am

I would have no idea if the oiler was working or if my fan was attached?? I'm handy enough to figure stuff out, but I've never worked on cars or motorcycles and I've spent about 5 minutes with this engine thus far.

Post by **noiseguy** » Tue Oct 18, 2005 1:36 pm

Is that a statement or a question?

D/l the service manual. Oiler is easy to check, fan is more a matter of making sure the shrouds are in place.

cpimp · Post by **cpimp** » Tue Oct 18, 2005 5:01 pm

it was meant to be a question- sorry.

Is the engine in the 84-87 spree the same as my 87 elite?? I just want to be sure.

Post by **noiseguy** » Tue Oct 18, 2005 8:30 pm

No. The oiler works differently, but the fan's the same. For reference, look at the '85-87 Aero manual, which is pretty close.

maddog · Post by **maddog** » Wed Oct 19, 2005 2:59 am

Don't drill any holes in that pipe, its not restricted, change the carb jet to a #87 and open up the air intake located on the airbox cover, you will gain some speed.