85 250r too rich

[yamaha225dr]

I never realized the same guy has been posting all of these threads and I have replied to a few of them. Yea, that trike is in serious need of an overhaul!

[Auto_Demon]

Ya, sorry for all the posts guys but i just need it to run long enough so i can take it on our camping/quading trip on the weekend of september 6. After that i am doing a rebuild on the motor

[Mosh]

I am not scolding you at all and you have no need to appologize for the questions. I was just putting the puzzle pieces together to form the whole picture.

Now IMO, I have pulled 2 R engines apart this year, that were purchased as "runners" that had stock pistons that looked like yours. They both had cracks going up the exhaust and intake sides and were literally seconds from shattering into a crankshaft twisting, jug cracking mess. One actually chipped some of the piston off and wadded the crank bearing up. I would highly advise you do not run it anymore. I have a feeling you might have the same thing going on. The one engine, had so much piston slap it cracked the bottom of the jug sleeve. If yours grenades, you are taking a major gamble on crank and case damage that will take a 800$ overhaul and double that price possibly...Just looking out for you..

[Auto_Demon]

Well to be honest if it was gunna go it would have aleady, when i had it running good i ran the piss out of it and it was fine, but it is getting an overhaul

[El Camexican]

Well to be honest if it was gunna go it would have aleady, when i had it running good i ran the piss out of it and it was fine, but it is getting an overhaul

Your money Dude, but if you end up venting your cases it's gonna be an expensive weekend.

PS. About that Chinese carb. There are two things in life you should never buy knock-offs of: one is Vise-Grips, the other is carbs. Get a used 36 or 38mm Keihin off eBay and rebuild it, you'll have a much better carb.

[Auto_Demon]

Ya i never bought the carb, it came with it, when i rebuild it im going to get a 36mm keihin pj quadvent, found one for $250

[El Camexican]

Ya i never bought the carb, it came with it, when i rebuild it im going to get a 36mm keihin pj quadvent, found one for $250

Too much! You should be able to do better than that for a PJ. Heck I have a fully rebuilt one with a new choke assembly and it's polished to boot. $150 + shipping and it's yours, but I'd recomment something like this over the PJ.

http://www.ebay.com/itm/KEIHIN-36MM-...#ht_533wt_1255

[Auto_Demon]

Well i have the majority of a 38mm keihin pj, just missing cap and slide but i dont hVe the main jet for it and i want to keep the airbox and the boot wont fit over

[yamaha225dr]

It's your machine but you are gonna really have a problem on your hands if that motor grenades. I can have my whole engine rebuilt for $600 but if it grenades and sends shrapnel down to the transmission the price can easily surpass $1,000. Which price would you rather pay? My motor is still pushing 180p.s.i but it's getting a full rebuild this winter just for the extra insurance.

[barnett468]

brand new fmf exhaust, put in a new plug when i put the jet in, it runs fine until wot then it sputters, but it smokes alot

plug is slightly wet and black all the way down inside with a slight brown hue

can you post a photo?

yes try around a 130 if 135 was the last.

what color is the smoke, lite gray or dark black?

does it linger or dissipate after a few seconds?

You plug should be bone dry when you remove it hot after 30 seconds because the heat will dry the gas up. if it is even barely moist 30 seconds after removal it is oil.

i suggest a leak down test. you might be sucking oil from the gear box due to a bad crank seal

Smoke is light greyish blue, and it lingers for a long time.

It is positively burning oil.

I checked the chaincase oil and its at a good level, rode it around for a good 5-10 minutes and checked it again and it was fine

Un fortunately it takes very little crank case oil to cause an engine to smoke so you might not notice a drop in your oil level in a short period of time.

plug is slightly wet and black all the way down inside with a slight brown hue

Simple, if you're sure it's rich get a smaller jet from the same vendor. some of the aftermarket jets are not equal in size to the oem ones.

Ya, sorry for all the posts guys but i just need it to run long enough so i can take it on our camping/quading trip on the weekend of september 6. After that i am doing a rebuild on the motor

My last post suggested a leak down test and mosh also recommended one. I also requested a photo of the plug and suggested you get the proper heat range if is not.

I suggest you simply follow my jetting post above until it runs clean or melts the piston, which ever comes first.

Even if you were running diesel oil with your gas it should not smoke at 50:1. that;s why i asked about the color and suggested it might be your crank seal...

[Auto_Demon]

Replaced the right side crank seal and its running better than ever now

[barnett468]

Replaced the right side crank seal and its running better than ever now

Wow, that was fast, well glad to hear it.