Need ideas on a bogging out engine!

zilerobe · Post by **zilerobe** » Tue Nov 11, 2008 4:20 pm

I have a 98 Honda Elite sa50. I bought it early in the summer and have been riding it without problems thus far. Since i have had it, it has always had smoky exhaust. It came with a full tank of gas and full reservoir of oil. As i went through tank of gas after tank of gas, the oil light never came on. fed up, I inspected the reservoir and found it to be bone dry. I immediately put GN2 oil in it and thought I would be ok. (not sure if this actually contributes to the problem at hand but thought some background would help)

Recently-she hasn't been running all that strong. I can start it up, leave it idle and even gradually give it gas almost to wot without issue. However, with a quick blurp of the gas or wot, it boggs down almost to death. If I let off soon enough, I can stop it from dying. Ive taken the carb apart multiple times cleaning it thoroughly (so i think). I also took apart the top end looking for something to jump out at me but as of now nothing seems bad with the exception of a somewhat heavily carbonated piston.

I need some help! My only idea is that it could use a new top end. I live at school now and as soon as I get home I'll get a compression read (i dont have a gauge here). If anyone knows what is wrong or has had this problem before or is having this problem right now by all means share your knowledge with me! I HATE NOT HAVING A MOPED TO RIDE!

Thanks in Advance everybody. This is an amazing site!

Kenny_McCormic · Post by **Kenny_McCormic** » Tue Nov 11, 2008 5:37 pm

Air leak? hows the air filter?

zilerobe · Post by **zilerobe** » Tue Nov 11, 2008 6:38 pm

No leak to speak of. I cleaned the air filter a little after I bought it ~2 months ago and everything looked and was great. I just went and double checked but I cant seem to find anything. unless Im not looking in the right place. any known troublesome areas?

beefy · Post by **beefy** » Tue Nov 11, 2008 11:50 pm

try taking a dremil tool with a wire wheel on it and clean all of the carbon you can out of that thing, out of the ports and manifold every thing even clean out the exaust pipe as much as you can with out damaging anything and if you can afford it put on some new rings on the piston I think there pretty cheap I don't know a whole bunch about them but if i was you thats what I'd try. On 2 strokes that makes a big difference also might help a lot of these guys to know how many miles are on the bike

Bear45-70 · Post by **Bear45-70** » Wed Nov 12, 2008 12:11 am

Richen up the air screw a 1/4 to 1/2 turn.

zilerobe · Post by **zilerobe** » Fri Nov 14, 2008 2:39 pm

Stopping by my dads garage later today. will pick up a gauge and see what the compression is. i spent a day last week tinkering with the carburetor after i cleaned it out. I couldnt get any symptoms to go away. I have a feeling that the rings need to be replaced, in which case ill do the piston as well. Either way-ill keep you guys updated. BTW-about 1700 miles on the bike.

Clivester · Post by **Clivester** » Sat Nov 15, 2008 1:21 pm

I'd say the compression test is the most critical thing to do here. If the compression looks OK I'd go with Kenny's suggestion that you most likely have an air supply/leak issue. Do you have a stock airbox, and is the air filter oiled?

If you recently installed an inline fuel filter that could cause similar symptoms. Check for sufficient fuel flow and tank venting.

Clive.

monkeywrench · Post by **monkeywrench** » Sat Nov 15, 2008 4:38 pm

ok id say it midly heat seazed do to no oil. still has compression but low do to it still starts up. usually when it doesnt start with the starter but starts with the kick start its the rings. take the seat bucket off pull the cylinder off put rings on then your done.├é┬á oh yah make shore you hone your cylinder before installing for maximum performance. for the cheapest way to do that is two stroke oil and scotch brite pad. take a long screw driver and rap the pad around the screw driver tight. then putt to the wall off the cylinder. put a 20 degree circular motion from the top off the jug to the bottom and then from the bottom to top. do this severall times untill you get nice little hone marks crisscrossing through the hole cylinder. it works great. p.s. start with a brand new scotch pad for best resoults.├é┬á├é┬á├é┬á├é┬á├é┬á

SprEE*MP* · Post by SprEE*MP* » Sun Nov 16, 2008 9:04 pm

Could also be over fueling. Mine did that. Make sure you put the float back together properly.