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Discussion Starter #1
well its been a rough evening. What started out as a simple oil change has quickly become a complete frustration. I need some help. To start with, we have a 1986 trx 70. I decided to change the oil because it looked like it was starting to smoke a little after about 1 month of my son riding on 10w 40 oil.So it was about time for it anyway. Well it was getting dark so I quickly propped the trx up on stands and proceeded to take out what was obviously NOT the oil drain plug. A spring shot out then a metal dowel looking rod came out behind it. So no big deal I thought, just pop it back in and take out the correct plug. Well I wasnt and still am not sure which way it goes back in. I put it in (the metal dowel rod) with the rubber plugged end up into the motor 1st followed by the spring which fit perfectly into the bottom end of the dowel,then the plug. Changed the oil and started the bike. HMMM tick tick tick, I was waiting for the oil to cycle through for the ticking to stop but it didnt, so i thought the rod was in wrong so i flipped it around, with the hollowed end with the metal bb looking ball in that end,put that straight up into the motor 1st with the spring 2nd pushing against the rubber end then the plug. Still no luck, seems like no oil circulation so i flipped it back to what looked like the obvious way with the rubber stop end up into the motor 1st then the spring then plug. Still no luck, but i did start to get some smoke out the pipe!. So the spring and dowel are now on the work bench waiting for me to get a manual tomorrow to put them in right.maybe it will still run for a while before a rebuild from this stupid mistake. Doesanybody know what this dowel with holes in it,rubber plug on 1 end and bb in the other is for and how it goes in?????? its in the bottom left of the motor, the oil drain is in the bottom right. thanks Dave
 

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Discussion Starter #2
well i just found an exploded view on bike bandit dot com,the rod is in the cam chain tensioner section, and it looks like it goes in the way i originally had it. still dont understand the ticking though.
 

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Run a compression check first.That will give me more to go on.If I had to guess I would say the timing chain and guides need replacing along with a top end rebuild.
 

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ya thanks for the advice. It finally did start pumping enough oil to get the ticking to quiet down but not before burning up the rings and cylinder i guess, because it smokes quite abit now....I will never change the oil like the manual says again. I drained the crankcase and pulled the recoil a few times to remove all oil from engine. Maybe that was part of the problem. I still dont know why it took so long to pump the oil thru the engine to lubricate everything? anyway,sounds like a winter project to rebuild the top end. I will get a repair manual soon and start studying.Shouldnt be too bad, looks like it can be done without pulling the whole motor out.There is a lot of room since the top end points more towards the front instead of up at the gas tank like larger cc motors.Any tips on the oil pumping situation?
 
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