Compression low

Jrad831 · 08-16-2023, 01:17 PM

So I was riding my 125cc tao tao and I got close to home and all of a sudden my bike lost a bunch of power , I had to downshift to second gear and keep the throttle pinned in order to maintain my speed. When I went to kick it over the next Day I noticed that Irs super easy to kick over. Also I haven't tried to start it yet because I got a new mikuni carb and I started putting that on and haven't finished that job yet. So I've read that it could be my valves are out of adjustment, I'm just wondering if it's more likely my rings got fried. I did have a bottle of injector cleaner in the fuel tank because my previous carb was having problems. I cleaned the jets out numerous times but I kept having a hesitation at cruising speed where it would act like it's not getting fuel.... anyways I'm just wondering if anyone has had this happen to them before? And what was the fix. Was the engine toast or the rings outta adjustment.

**JerryHawk250** · 08-16-2023, 01:30 PM

Check and adjust the valves first.

dirtbkr188 · 08-16-2023, 03:47 PM

.003" for intake and .004" for exhaust are the preferred settings

08-16-2023, 01:17 PM	#1
Jrad831 Join Date: Aug 2023 Posts: 3	Compression low So I was riding my 125cc tao tao and I got close to home and all of a sudden my bike lost a bunch of power , I had to downshift to second gear and keep the throttle pinned in order to maintain my speed. When I went to kick it over the next Day I noticed that Irs super easy to kick over. Also I haven't tried to start it yet because I got a new mikuni carb and I started putting that on and haven't finished that job yet. So I've read that it could be my valves are out of adjustment, I'm just wondering if it's more likely my rings got fried. I did have a bottle of injector cleaner in the fuel tank because my previous carb was having problems. I cleaned the jets out numerous times but I kept having a hesitation at cruising speed where it would act like it's not getting fuel.... anyways I'm just wondering if anyone has had this happen to them before? And what was the fix. Was the engine toast or the rings outta adjustment.
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08-16-2023, 01:30 PM	#2
JerryHawk250 Moderator Join Date: Oct 2016 Location: Houma, La. Posts: 11,552	Check and adjust the valves first. __________________ 2023 Lifan Lycan 250 Chopper 2023 Venom Evader 2022 Lifan KPX250 2020 Kawasaki Vulcan S 2004 Honda ST 1300 2016 Black Hawk 250 (sold) Keihin PE30 carb,125 main,38 slow.Pod filter,ported & decked head 10:1 CR,Direct Ignition Coil,15/40Sprockets,NGK DPR8EIX-9,De-Cat,Dual Oil Cooler,Digital Cluster 2016 Cazador180 XL 2014 Coolster150 JerryHawk250.com My YouTube Channel
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08-16-2023, 03:47 PM	#3
dirtbkr188 Join Date: Aug 2009 Posts: 496	.003" for intake and .004" for exhaust are the preferred settings
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