Overheating help

  • Silver Tiger
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09 Jun 2009 21:27 #297927 by Silver Tiger
Replied by Silver Tiger on topic Overheating help
he does but its kinda hobo rigged. i would like that hose he uses though :laugh:

Bikes Owned
1972 Rickman 250 Montesa
1974 Z1 - Kz1000 Jug 1045cc 10.25:1,Port and polished,Oversized valves,Underbucket shims,36mm Mikuni RS Flatslides,Dyna 2000 and 2.2ohm coils, Webcams 435 @ 288° duration,Taylor wires,NGK iridium plugs
1977 KZ650c
1979 KZ650SR
1981 XV750 Virago
1994 XT2

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09 Jun 2009 21:36 #297929 by PLUMMEN
Replied by PLUMMEN on topic Overheating help
Silver Tiger wrote:

heres a pic of that tach u can get a matching speedo too

oh my aint that purdy,rest of bike looks pretty nice also! B) im gonna say as far as your overheating issue id definately run an oil cooler .youve basically got a healthy dragbike motor that would be fine a 1/4 mile at a time with a cool down between passes ,but stop and go traffic with those cams and carbs is going to keep it loaded up causing your overheating issue. B)

Still recovering,some days are better than others.

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09 Jun 2009 21:57 #297948 by Silver Tiger
Replied by Silver Tiger on topic Overheating help
i only took it to the track once so far and i suck and dragn didnt even burn out tire and i got a low 11 like 11.30 or 11.20 :P thxs for the comment

Bikes Owned
1972 Rickman 250 Montesa
1974 Z1 - Kz1000 Jug 1045cc 10.25:1,Port and polished,Oversized valves,Underbucket shims,36mm Mikuni RS Flatslides,Dyna 2000 and 2.2ohm coils, Webcams 435 @ 288° duration,Taylor wires,NGK iridium plugs
1977 KZ650c
1979 KZ650SR
1981 XV750 Virago
1994 XT2

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10 Jun 2009 20:03 #298189 by PLUMMEN
Replied by PLUMMEN on topic Overheating help
depending on what youve got for a rear tire low 11s aint really bad for not knowing what youre doing,just practice getting down the track in one piece and the times will improve with practice ! id be willing to bet if you dropped down to the 29-31mm area in carb selection youd be pleasently suprised with the improvement in drivability and your luck at the track B)

Still recovering,some days are better than others.

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10 Jun 2009 21:06 #298204 by Silver Tiger
Replied by Silver Tiger on topic Overheating help
i have a old maxxis on it now. im going to switch to a pirrelli sport demon soon. 130/90 16inch
i acutally just dropped the slide needle on and made my carbs richer on the mid range runs even better i should have done it sooner.:side:

Bikes Owned
1972 Rickman 250 Montesa
1974 Z1 - Kz1000 Jug 1045cc 10.25:1,Port and polished,Oversized valves,Underbucket shims,36mm Mikuni RS Flatslides,Dyna 2000 and 2.2ohm coils, Webcams 435 @ 288° duration,Taylor wires,NGK iridium plugs
1977 KZ650c
1979 KZ650SR
1981 XV750 Virago
1994 XT2

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10 Jun 2009 21:42 #298208 by kzz1p
Replied by kzz1p on topic Overheating help
Silver Tiger wrote:

i have a old maxxis on it now. im going to switch to a pirrelli sport demon soon. 130/90 16inch
i acutally just dropped the slide needle on and made my carbs richer on the mid range runs even better i should have done it sooner.:side:


Adding fuel mixture, cools the motor temp. In my opinion, I would rather be spot on at a idle and a touch, rich wide open. It buys me a safety zone!

You may also try retarding the timing. If you fire the motor at a later time, the motor has a longer cooling peroid.

Gear ratio - Every motor! electric or gas, has a speed that it likes to operate at. At that one speed, everything just clicks, the flow, engine temp, timing, fuel mixture, etc.

The age old trick, is to find that spot?? Gear ratio and riding style, affect engine temp.

Then, if you adjust to the problem and reduce the heat, buy an oil cooler, they look cute.

PS- If you lean the mixture, temp goes up. If you advance the timing, temp goes up. Wrong gearing, temp goes up.

I guess all you can do, is reduce cylinder temp or reduce cylinder pressure.............Take it for what, it's worth!

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11 Jun 2009 08:20 #298325 by Silver Tiger
Replied by Silver Tiger on topic Overheating help
thxs man for all the info. :cheer: for where my bike likes to run it likes to cruise around 70 to 80 all day i do have a 530 chrome x ring chain with sprockets to match, z1 enterprises recommended it to me for less weight im pretty much as high as they go on the front and rear that they sell. still tops out around 140mph not 160 but not bad.

Bikes Owned
1972 Rickman 250 Montesa
1974 Z1 - Kz1000 Jug 1045cc 10.25:1,Port and polished,Oversized valves,Underbucket shims,36mm Mikuni RS Flatslides,Dyna 2000 and 2.2ohm coils, Webcams 435 @ 288° duration,Taylor wires,NGK iridium plugs
1977 KZ650c
1979 KZ650SR
1981 XV750 Virago
1994 XT2

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11 Jun 2009 17:44 #298481 by keith1
Replied by keith1 on topic Overheating help
Silver Tiger wrote:

are you going by oil temp or head temp?




oil temp

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11 Jun 2009 18:48 #298495 by Silver Tiger
Replied by Silver Tiger on topic Overheating help
k well my oils around there too then. i was going by head temp with a infrared heat gun

Bikes Owned
1972 Rickman 250 Montesa
1974 Z1 - Kz1000 Jug 1045cc 10.25:1,Port and polished,Oversized valves,Underbucket shims,36mm Mikuni RS Flatslides,Dyna 2000 and 2.2ohm coils, Webcams 435 @ 288° duration,Taylor wires,NGK iridium plugs
1977 KZ650c
1979 KZ650SR
1981 XV750 Virago
1994 XT2

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11 Jun 2009 19:24 #298506 by davel
Replied by davel on topic Overheating help
Silver Tiger wrote:

ive had my bike dyno'd (if any one wants to read the chart i could post)


By all means. Post it if you've got it. Also the cam grind number and any other performance mods. Thanks

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11 Jun 2009 21:27 #298528 by Silver Tiger
Replied by Silver Tiger on topic Overheating help
i cant find a picture all i have are a few of my run files but youll have to download winpep7 from dynojets site its free ;)


as for cams im pretty sure they are these i forget i threw out the box i do remember they were biggest hotstreet they sold but there web site is a little differn't look'n now B)


Excellent mid and upper end performance for hot street. Requires High Compression Piston, Shim Under Followers, and Performance Valve Spring Kit. Price Per Set (2).

.435/.435 288°/288° 260°/260° www.webcamshafts.com/pages/motorcycle/ka...ta/tc_1730_2573.html

i also don't remember my valve size here a pic :side:

Bikes Owned
1972 Rickman 250 Montesa
1974 Z1 - Kz1000 Jug 1045cc 10.25:1,Port and polished,Oversized valves,Underbucket shims,36mm Mikuni RS Flatslides,Dyna 2000 and 2.2ohm coils, Webcams 435 @ 288° duration,Taylor wires,NGK iridium plugs
1977 KZ650c
1979 KZ650SR
1981 XV750 Virago
1994 XT2
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11 Jun 2009 21:32 #298529 by Silver Tiger
Replied by Silver Tiger on topic Overheating help
wouldn't let me post without zipn :unsure:

Attachment moo.zip not found


Bikes Owned
1972 Rickman 250 Montesa
1974 Z1 - Kz1000 Jug 1045cc 10.25:1,Port and polished,Oversized valves,Underbucket shims,36mm Mikuni RS Flatslides,Dyna 2000 and 2.2ohm coils, Webcams 435 @ 288° duration,Taylor wires,NGK iridium plugs
1977 KZ650c
1979 KZ650SR
1981 XV750 Virago
1994 XT2
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