Stop!!!!!!!!!!!!!!!!!!!!!please Read!!!!!!!!!!

Just picked up an 84 LT185 ATV, I understand there was an accessory add  on that gave it electric start, anyone have any info about that kit? 

Hi all.  New to the forum & quads.  Seems like a great place full of info.
I just recently picked up a 2005 Suzuki KingQuad LTA700.  I need a battery.  I've been reading up on conventional vs AGM types.  I have a Royal Distributing and Canadian Tire.  RD has 2 types avail for my year/Model a battery YTX16-BS CRANK $75, and BATTERY YTX20CH-BS YUASA $140.  Neither of these is the type from the manual FTZ16-BS.
from what I can tell... I think the only difference is the capacity with the $75 unit rated at 14 AH/10HR and the $140 unit rated at 18 AH/10HR ... which is the rating in the manual for the FTZ16-BS.  How much does this make a difference for nearly x2 the cost?
And about the models/type numbers.... what is important to know ... they all end in "-BS" but are the other details relevant or just manufacturer naming?

Hi all. I have a timberwolf 250 2nd that will not start.. I thought it was out of time bc the guy I got it from said it just quit on him. The tensioner had a nut welded to it and it was like2 teeth off. I installed new tensioner and chain and it still will not start. It has fire and it will not hit off brake cleaner. It has compression. Haven't put a gauge but I'm sure it will crank and run with what it has. I double checked my work and it's still in time. Spot on. Both valves move. I'm about to put a feeler gauge on them and I'll cone back but other than that any ideas?

Background,
This winter (Dec.) I was plowing and everything just died, just quit.  No lights, no pull start, No nothing.  I've had this problem before and I changed the voltage reg and it ran fine for over a year. Then this.  So I changed it again, thinking this was the same problem.  Tried to start it and a small pin hole in the CDI appeared with electrical smoke.  
Months go by and I finally decide to just replace parts (I'm Horrible at electrical issues).  I changed the stator, new CDI, new Voltage reg, new starter solenoid, tested the starter (prefect), charged the battery.  
Went to start it and the solenoid rapidly clicked.  All the dash lights on, headlights work.  Pull stared it and it fired right up no issues.  Looked into the rapidly clicking starter solenoid and it was not enough juice in the battery.  Took the battery completely out and hooked up a jump box to it turned the key, light on, everything looks good.  Pushed the starter button and it fired right up ran great.  Turned it off to test it again, Turned the key and nothing.  No dash lights nothing.  Took the jump box off and pulled started it.  Started it right up.  Re-hooked the jump box, still nothing.
Any Ideas? 

Just picked up a 2006 Dvx400. There is a switch I can't figure out what it is or where it goes. Has 3 wires (light blue, black and Yellow)