Do any of you have the "rattle"?
There have been several threads over the years about replacing the OEM cam chain tensioner (cct) with aftermarket manual type (no spring). This is a fine method but I wanted to fix the stock one. This is done to eliminate the rattle that shows up in the Rincon. The rattle is worse when cold and goes away when hot…eventually it will not go away. The rattle is your cam chain whipping around due to inadequate tension and will wear out the chain more quickly than a properly tensioned one.
There are several threads relating to parts of this issue and repair, so some of what I suggest is not my original thinking. Here goes.
The stock cct uses a spring loaded ratchet that extends as the chain wears. This is the issue. The ratchet has 4 revolutions from full in to full out. When the chain is new, the cct does not extend much and the spring is tight. As the chain wears, the ratchet goes further out and the spring unwinds thus having less force available. Somebody posted once that they tightened the spring but had no more details how they did it.
On my atv the OEM cct started to rattle at 7500 or so miles and I just replaced it. Problem solved for a while. Then lately at 11,300 miles the rattle returned. I was going to put a manual cct in but did not want to always wonder does it need to be adjusted or not (and I am cheap). So I removed my cct to have a look.
Sure enough, on my bike the cct is currently at 3 revolutions out and I only have a little more travel left (1 revolution). The remaining spring tension in the cct was not enough to extend the ratchet any further. I had a spare cct from the first change. I disassembled it to see how to tighten the spring.
Here is the best description I can give.
· Remove the retaining circlip with the plunger held by a finger so it does not pop out of the cct body.
· Let the interior mechanism come out until the circlip groove is just above the cct body still holding plunger with finger.
· Use installation key or screw driver and add 2 to 3 “extra” full twists (complete 360 revolutions) to spring. I would not add more spring tension than this as the spring would have unwound the amount I am rewinding it.
· Then push plunger back inside cct body until circlip can be reinstalled.
· This seems complicated and took me a few hours to figure out it could be done without fully disassembling the cct.
· The difference in force the cct applies after fixing is very noticeable.
I reinstalled the cct and my bike is now purring again when cold at start up. When it starts to rattle again, I likely will need a new cam chain.
I had pictures but they were not good enough to show what I was doing...sorry. I will check in on thread if anybody has questions or comments about my repair. Happy motoring.
Rattle free again in Kentucky.
I know this is an old post, but do you know if the improved cam chain tensioner on the 06 Rincons and newer, will fit the 03 Rincon? Thanks