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Junior Member
Join Date: Sep 2009
Posts: 19
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Well I can tell ya this, even with semi-auto, you still have a clutch. If you're driving in a straight line, there should be absolutely no noise. Well actually there will be some noise from the engine and the humming of the tires on pavement, road, wind noise, and the exhaust sound. BUT, NOTHING like grinding, squeaking, pinging, clicking or any other odd sounds emulating from the machine. NOW, if you make a turn of the ATV while on pavement, then IT WILL make some noises, because the tires are getting a bite and go through the turn, but there's no slippage, then YES, there may be differential noises, or tranny noises telling you that you need to stop doing that. OR, do it a little easier/slower and not turn so sharply.
You have very good oil pressure, and you don't need to worry about how hot the engine appears, as it's self regulating up to a point. Surrounding air temperatures and ATV movement regulates the cooling effect, while the heat of the engine controls how warm the oil gets and this is where the help from the oil radiator comes in to help with cooling down. If engine does overheat, then your oil light should come on if it's working properly(I would check with ATV repair shop or Dealership mechanic to verify this). If oil light flickers or comes on while moving, then stop immediately and check oil amount or check if ATV is operating at too steep an angle and throwing off oil level in crankcase. It's also important you have the correct oil installed in engine. If you have "too thin" of oil than required, then oil can't keep up with the heat(summer time) and viscosity will break down quickly, and engine could/will spin bearing(s), immediate loss of power, clutch not working, oil burning(going past rings) in other words a possible seize up and having to have engine rebuilt. If you have "too thick" of oil, when engine is at it's coldest(freezing points) then the thick oil CAN'T circulate properly and you wind up with the same things that can happen with too thin oils. Just remember that even though this is a ATV, the engine still acts like a air-cooled motorcycle engine and in order to keep the engine from overheating, YOU MUST NOT let it just sit and idle for long periods of time. Liquid cooled ATV's are totally different in that they have true radiators, temperature thermostats, cooling fans, and the cylinder(s) have liquid cooling ports on their interiors, even if they have cooling fins. There are some 2-stroke ATV's that are air/oil cooled that also have cooling fans, but that's their design. In Springtime, do the initial choke start-up and get moving after no more than 45 seconds to 1 minute. In Summertime/early Fall, you can get moving in 20 seconds to 1 minute. In late, cold, Fall and Winter it may take up to 2 to 3 minutes for the machine to respond to throttle properly. These are just some examples, as not all ATV's respond the same, according to their state of tune, and whether they're carburated or fuel-injected and some machines are just more cold-natured than others.
As to the pinging, there are a couple forces acting together here, and you need to clear this up. One, is to put some carburator, valve and top-piston cleaners through the system to get rid of carbon that's built-up on piston. Second, if cleaners don't take care of pinging, then you will need to go to a higher grade of fuel---There's no choice either way--you don't want pinging. If I remember correctly from my "98 Big Bear owner's manual" it required the usage of mininum 85 or 87 octane. So you may want to look to the fuels you've been using first. Also, if you have "regular unleaded" gas(no ethanol/alcohol mixed) I would try this first, as long as it's the proper octane rating, to see if pinging goes away.If it does, then you know that "ethanol" fuels are possibly the problem. DO NOT put in any fuels that have more than 10% ethanol. AND, NEVER put in any fuels that contain "Methanol" or "Ethanol 85"(15% ethanol) or "Flex fuel" as they're totally different types fuel and they WILL do harm, as your engine isn't set up for it. Hope this helps with your problem. Any other problems, that's what we're here for.
Del
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