03 650 poor performance - Honda Rincon Forum : RinconRiders Honda Rincon Forums


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Old 06-02-2011, 08:38 PM   #1 (permalink)
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Default 03 650 poor performance

Hi,
I'm new to the forum and owning a rincon.
I traded my 03 660 grizzly for this 03 650 rincon. It idles rough (quad shakes a little when idling, kinda looks like a Harley idling), it starts right up, no smoke, typical Honda motor noise, shifts good and strong.
Here's my problem, The rincon doesn't seem to have any bottom end power or torque. Top speed is about 40-45 mph. When under aload it just acts sluggish.No tranny slippage, just lacks power. Almost like your dragging a boat anchor behind you. I have put the quad up in the air in nuetral and all four wheels seem to spin freely, so I'm pretty sure it's not a brake dragging. I checked the valve clearances and adjusted them to specs. I have tore the carb down and cleaned it with compressed air.( the jets are tarnished pretty good, but the orfices looked clear of any debris when i reassemble it. Changed the plug and engine oil (mobile 1 t4 atv motorcycle oil) My buddy has run this in his for years with no problem, and I have just a hair over full. At times it will idle really bad like it just lost a lobe on the cam or something, but rev it up for a couple seconds and it comes out of it.
Any ideas? What are the electrical connections on the carb and there purpose?

Rincon has a K&N filter, Exhaust tip on stock muffler, and 26" tires. everything else is stock.
Any help is appreciated, and I thank you in advance. Starting to wonder if I should of Kept the Grizzly LOL!

Thanks, Skip
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Old 06-02-2011, 08:49 PM   #2 (permalink)
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Welcome to Rincon Riders skip650.

From what Iread your Rincon is not too far from normal. How many miles are on it?

It's hard to trouble shoot a tuning problem with out hearing it operate. One sign it's running lean is it will backfire while coasting. Pull the fuel line from the carb and make sure it's flowing good. With thetall gearing these atvs are not dragsters off the line. Only problem I've read about 03s are o-rings in the tranny leaking by causing slipping. We have had about a dozen that needed timing chain tensioners and guides replaced. Any sign it's been submarined? Loook inside the air box for mud stains.

Also check your axel oil levels too.
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Old 06-03-2011, 07:34 AM   #3 (permalink)
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SunkAgain
No signs of it being swamped. Also, i don't have a backfire issue either, thats where it stumped me. I have changed the O'rings on the solenoids and the valve body. the quad shifts good and hard. The Rincon has 798 miles on it, about 200 hours. This thing has sat more than it's been on the go over the last 7 or 8 years. espesially the last year from the story I recieved from the previous owner. The Engine noise seems pretty typical for a Honda motor, just a light tick from the valves/or tensioner. Alot quiter than my buddies 03 Rincon, and his is running perfect. This is where I am figuring I have a power problem.

My buddies 03 has K&N, 26" vampires, and exhaust tip. Mine has a K&N, exhaust tip, and 26" dirt tamers. His has about double the tourque my quad has. I was leaning torwards the cam.
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Old 06-03-2011, 10:59 AM   #4 (permalink)
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There have been some cams go bad, maybe heard of 3 or 4 so far so it isn't a common problem. To check yours pull the rocker covers off and place a dial indicator on the rocker arm, measure total arm travel on each one. You will know right away if you wiped a lobe.
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Old 06-03-2011, 07:21 PM   #5 (permalink)
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Have you tried to initialize the ECM? I can't remember how to do that, maybe someone on here does.
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Old 06-04-2011, 09:26 AM   #6 (permalink)
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Checked the cam, and all is good there. I've not heard of initializing the ECM.
What does that actully do, and does anyone know how it's done.
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Old 06-04-2011, 10:32 AM   #7 (permalink)
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It is in the manual - Do you have one? I am not sure what it does. I had this SAME problem with mine. This is the advice I was given. Check your solenoids and ALL the connections. Mine was the solenoid in the front of the motor, the shift one (s). Also, there is a switch that comes down the back of the motor (the wire) and plugs into the tranny. it has a shaft and a pin that slides through it, I will research it and find out it's name. This was also bad on mine. it's a $72 dollar part. What it was doing was NOT fully engaging into drive. It was reading Drive, but wasn't fully switching the transmission into drive. It was a long shot, but it was my problem coupled with the shift solenoids. I found this switch used for $13 on Ebay, you may want to check there. I have the manual as well if you need that. Little Grasshopper and Elwood helped me out a ton here. If you read some history, you will see who knows what here, this is a great site. As a member told me, "stay in touch" we WILL get you going.

Ben
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Old 06-04-2011, 04:51 PM   #8 (permalink)
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Have you done a plug check yet? It may be running lean with the mods that are on it. I would try an adjust on the A/F Screw. Back it out a 1/4 turn and try it. You may want to back it out another 1/4 turn if it improves. I would also change the Idle Jet from the stock 50 to a 52. If the Plug Check shows lean, a white colored plug I would go up one or two sizes on the main jet. You will only know for sure with a Plug Check.
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Old 06-04-2011, 05:27 PM   #9 (permalink)
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I have always disagreed with putting on over size tires. I understand why people do it it but I have never had a problem going where I want with the stock size tires. I will admit that I do not do mudding or swimming with my Rincon. My Rincon will do almost 70 mph. You can see by my signiture below the mods I have done. The Rincon is a great Quad but it does lack power in certain areas. If I was to do any further mods it would be the Big Red Gear Reduction mod, but I do like the speed I get with the way mine is set up. Try doing what I said in the post above and let me know what you find out.
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Old 06-04-2011, 07:33 PM   #10 (permalink)
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ECM (computer) must be re-initialized if the ecm or throttle position sensor are replaced. turn ign switch on while holding up and down buttons down at the same time. N on dash should blink within 5 seconds, push shift buttons up,down,up. Dash should read --- within 5 seconds,move throttle from full closed to full wide open and back Dash should read N when completed I copied this from another website. This only for '03 thru '05 models it will not work on the fuel injected models.
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