Yamaha tri moto 225 dr

[518redneck]

Well I had it running and and had it rev to where it was sputtering and I hit the Cdi box with a rubber end of a screw driver and the sputtering went away for a couple seconds then it came right back. I think the Cdi box is the problem and the book said that the Cdi my cause rapid misfire. I just wondering if the stator is to weak to make the Cdi work right

[518redneck]

Well I had the stator checked by a dealer and it checked out ok. I guess my Meter is broke. So I bought a CID box off the Internet and just tried that. Still about 1/4 to full throttle it breaks up. Rechecked the valves rechecked the timing and recleaned the carb. I don't have a battery in it. I was told by a few people that on these tri motos you need a battery to make it run right. Is that true?

[muthey]

no that's not true, the only thing that actually runs off the battery is the electric start. I have a feeling you have a ground issue somewhere on the trike, and the dr cdi's have issues all of their own, it might be possible to use a dx cdi, and see if that fixes your issues. Have you checked the w clip on the throttle valve to see if it is out of place and allowing the main needle to move improperly?

[518redneck]

I have tried a dx Cdi box and it has the same issue. I put a battery to it and that didn't help, I didn't think it would. I checked and cleaned up all the grounds and checked all others connections. I been through the carb a half dozen times and it seems to be clean and adjusted to factory specs according to the book. I was also told that there might be small cracks inside the carb where the main jet is, I can't see any. I recleaned the gas tank and put new gas in. I don't know what else to try other than a different carb maybe?

[swampthang]

Did you clean the carb or rebuild it? If you rebuilt the carb did you use the old main jet or the new one? The reason I ask is the rebuild kit for the dx is the same one for the timberwolf and beartrackers but with a smaller mainjet.

Check to see if there is any mud dobbers nest in the frame where the airbox draws in air up by the gas tank. Blow some air threw it to make sure. I have had machines act the same way and this was the problem.

As for factory specs on a 30 year old carb forget about it. Thats a good starting point but you will more then likely have to adjust.

[muthey]

have you checked for a plug in the intake tube through the frame, those run all the way through to the neck, also is your air filter clean or oiled? if nothing else try a new carb sometimes the carbs are just wore out it happens

[518redneck]

Anymore ideas? Keep them coming! I'm all out. I tried everything you guys post and what I thought of. I'm going to hopefully have a different carb this weekend. Mind I see is missing the main jet baffle plate. But I don't believe that's the problem. So anymore helpful hints would be appreciated.

[muthey]

no that is an atomizer, it helps keep the fumes limited so you don't vapor lock.I would definitely try a new carb and if that doesn't do it then there is a timing issue

[518redneck]

I tried a 22mm Honda carb and it has the same issue. Compression is low book says 114 min Its a little above 90. Im going to recheck the timing.

[518redneck]

Timing marks all line up. Took the muffler off to see if it's plugged. Did another compression check and this time it read right on the money at 125. Must of had a leak the last test. I think my next step is to try the stator and pickup eye from a parts dx.

[518redneck]

I checked the spark with a inline spark tester. It never lost spark when it acts up. I took the carb to a dealer and had a mechanic look at it. He said he didn't see anything wrong. If you watch the slide and needle as its running at idle then throttle it up it spits a lot of gas out of the needle/main jet. If you let off the throttle until the gas stops spitting out it will run fine. I tried a smaller jet. It still did it. I tried a different needle it still did it. The original needle is the correct one and it doesn't seem warn. I don't know why it's dumping that much gas in it. But it floods the motor right out. Any ideas?

[Rigaman]

I have a 225dx. There was a recipt from the previous owner that had the same problem. It said on the recipt that they noticed a wire getting pulled when the handle bars turned. Maybe check your wires and see if turning the bars put any tension on any wires.

[muthey]

I'm beginning to think you have an issue with your intake valve, or have you oiled the air filter yet? most of these 225 used a oiled air filter.

[trizilla]

how about an intake leak? like a torn intake manifold?

[yaegerb]

1/4 to WOT it is stumbling? It sounds like you have exhausted the electrical issues. Do you know if you have the stock jets in the carb? Have you performed any modifications to the three wheeler (air box, pipe, etc)? It almost sounds like your main is the wrong size.