300 4x4
#1
#2
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Kevin, the 98 300 has the same front end as a king quad. if you take the 4x4 shift lever off the front and repostion it you can have 4x4 and 4x4 lock. if you can get a longer cable for the 4x4 shifting you can have 2wd, 4x4, and 4 wheel lock. i modified my shift cable and made it longer. it lasted for about 3 years and broke so now i just get off and move the leaver by hand. as for tires i talked to one guy who had 27's on the back of his and 26's on the front. i have 26's all the way around on mine but i have more air in the back tires to compensate for the 1" tire difference between the front and rear tires. you will loose allot of top speed ie i dont even use 5th gear any more. but it has no problem turning the 26's in low 1st gear and i dont imagine 27's would be any harder.
#3
#4
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The lever i am talking about is the one on the front diff. all you need to do is remove the bolt that holds it on take the lever off and rotate it up a few splines (3 splines is what i am thinking) put it back on and then you should be able to feel the 3 positions on the lever and that will give you 2wd, 4x4 and 4 wheel lock.