Well I have a mod'd Tri-Z and a Stock 86 KXT. My Z is absolutely NOT slow but the KXT edges it out. The KXT is quicker and revs out forever compared to the Z. Part of my problem with my Z topping out is it's tires. 18" rears but I have a 14 tooth front sprocket to compensate some. Who cares about top speed, acceleration is where its at. and the KXT rules. If both trikes had fresh motors, There is no doubt in my mind that if my Kaw had comparable mods to my Z, it would chew it up and spit it out even worse. The Z motor does have more lowend power. Which I like. My 84 KXT had about the same mods as my Z. On topend, the 84 was unreal!
If your used to an 86 KXT, don't expect to get the same feeling from a stock Tri-Z. You will enjoy the added lowend but it may feel flat on top. Another thing is the handling. I hate to say it, but the 85 just doesn't handle as good as a KXT. You probably remember how your Tecate craved slides. My 85 Z doesn't perform like that. I know nothing about the 86.
With that being said, I still recommend you pick up the Z. They are great trikes and second on my all time favorite list. You'll like it. But PLEASE don't turn it into a 4 wheeler! :shock:
Of course, this is my opinion of MY trikes. I love Tri-Zs. And I don't smoke.
1986 Tecate
1984 Tecate
1985 Tri-Z
1986 ATC350X
1985 ATC250R (2)
1985 ATC125M (2)
1982 ATC70 - Original Owner
175 TriMoto Frame with Pro-Tec Rear Suspension
3-Wheelin' since '82