ater talking with T3 LOPES out at silver lake i was informed that a KX250 cylinder and power valve is a bolt up option for more hp on my T3.....so i need to know what years are interchangable or which ones are better than others,thanks
At The Back Of The Pack
Arm chair racerAt the back of the pack
ater talking with T3 LOPES out at silver lake i was informed that a KX250 cylinder and power valve is a bolt up option for more hp on my T3.....so i need to know what years are interchangable or which ones are better than others,thanks
2003 banshee ported jugs,piped,yad-ah,yad-ah
1986 tecate KX5 swap
1986 350X(cammed ported piped)sold
1985 250R(310 klemm pipe)
1985 atc70 x 2
other toys
1995 mustang cobra 6 speed twin turbo
1075 rwhp 963 rwtq
9.25@156mph
1992 GMC typhoon 402c.i. LS1
4L80E AWD twin turbo a/c power steering and cruise
963 AWHP
9.40 @ 147 on 4 drag radials
First Time Rider
Arm chair racerNew to the board
my best guesss will be the same year *Edited**Edited* trike is
Got The Holeshot
Arm chair racerJust too addicted
I'm 95% sure its the 84 and 85 KX motors for the 86/7 T3's...
86 350X
85 350X daily rider
LC 250R
85 T3
86 T3 roller
85 250sx beater
Power User
Roostin Away
Second get t-3's and 86 kx 250's use the same cylinder. No difference. What is different is the exhaust valves, governor, and shaft that controlls the exhaust valves. No power increase is realized by just cylinder swapping like earlier 84-85 non P/V engines. It's the components that are different.
At The Back Of The Pack
Arm chair racerAt the back of the pack
gotcha i must have mis-understood him,i thought he was saying that the porting and timing in the kx jugs where more aggressive and i would benifit by changinhg to that set upOriginally Posted by tecat-z
2003 banshee ported jugs,piped,yad-ah,yad-ah
1986 tecate KX5 swap
1986 350X(cammed ported piped)sold
1985 250R(310 klemm pipe)
1985 atc70 x 2
other toys
1995 mustang cobra 6 speed twin turbo
1075 rwhp 963 rwtq
9.25@156mph
1992 GMC typhoon 402c.i. LS1
4L80E AWD twin turbo a/c power steering and cruise
963 AWHP
9.40 @ 147 on 4 drag radials
Power User
Teaching quads a lesson
83-84 kx 250 cylinders fit the 84-85 tecate. the 85-86 kx250 is the one for the 86-87 tecate. but like was already mentioned, the 2nd generation t3 wont feel as much of an upgrade as did the first generation t3 with the swap. alls thats different is the powervalves. if you have it ported and polished then you would feel a bit of a boost. the reason why the first generation was such an upgrade was because there was a bridge in the exhaust port on the 83-84 kx cylinder as opposed to none on the t3 cylinder.
1985 KXT 250 Tecate - kx cylinder, kx ignition, bassani headpipe, answer silencer, v-force reeds, 38mm airstyker carb, +2 franks swinger, raptor rear shock.
1996 YSF240 Blaster - maxxed out!!!
Life's journey is not to arrive at the grave safely in a well preserved body, but rather to skid in sideways, totally worn out, shouting "HOLY SH-T, what a ride!"
At The Back Of The Pack
Arm chair racerFirst time rider
after 86 the bore changed on the KX so you can't use them.
1986 Kawasaki KXT 250 tecate
ported, FMF pipe, DG silencer, boysen stage II reeds, 39mm keihin PWK, T4 thumb throttle and front master
Power User
Got the holeshot
The '85 KX cylinder is different and may offer different performance than the '86 KX/KXT Cylinder... Better or worse I dont know... The '85 kx cylinder has a bridged exhaust and small subs like the '83-'84 KX cylinders...
1985 KX
1986 KX
Power User
Roostin Away
I would have to think, that the reason for the change was to prevent the tendancy of seisure on the exhaust side. As far as max power output, the bridged exhaust has a wider exhaust and would probably evacuate a bit faster. And the bridge allowed designers to "tune" each side of the port. So the bridged exhaust may have a bit more max output potential. I'm currently assembling a 86 kxt engine with a sleeved cylinder. Not what we wanted, but it will work for now. We have a NOS 85 KX cylinder that will be used next year. But, finding all of the exhaust components is the trick. Many differences in all of the parts. So the search goes on, and we will find out sooner or later about the performance difference.
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