Overheating help
- keith1
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Re: Overheating help
09 Jun 2009 18:39
Silver Tiger wrote:
I know there are other posts on overheating and oil coolers but i wanted to try to get a more specific answer.
I have a 1974 z1 it has a kz1000 jug 1045 10.25:1, port and polished,over sized valves,36mm mikuni flatslides,dyna 2000 and coils, largest hotstreet web cams sold,taylor wires,ngk iridium plugs standard heat range. completely rebuilt last year
basically i don't know what temperature a kz1000 a should run at. my heat gun reads about 295 to 305 on the head and 240 on the jug, it warms up quickly and stays constant. i tested a friends kz1000 with similar modification and it was running around that as well. ive had my bike dyno'd (if any one wants to read the chart i could post) it is a little rich in bottom end and dead on in the top end, the bike isnt running lean, but after i ride it around for about a hour or so it starts getting hard to shift between gears and doesnt like to idle and the engine feels pretty hot the heat gun still only says around 300. im running 10w40 amsoil in it right now and going to switch to 20w 50 next oil change.
I don't have a oil cooler and id like to install one, but i still don't know what size to put on it and how to run the oil channels. also i know a z1's oil pressure is only like 10 psi so would that be a problem with a oil cooler? ive tested my oil pressure i get about 12 to 15psi around 4000 rpm.
sorry if my text is confusing and thxs for any replys
just as a reference, my bike runs at 200 after 45 mins of stop and go and cruising mix with slight goodies...i think the 10.5 to 1 is the heat maker...i m running an old school cooler that i think was a popular one back in the day...i saw a new one in the box a ways back on ebay and looking back, i should have grabbed it......i run a temp guage and a pressure guage just to keep tabs.......keith
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- keith1
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Re: Overheating help
09 Jun 2009 18:41 - 09 Jun 2009 18:42
old school cooler..still have the same cooler...old b4 rebuild pic....
Last edit: 09 Jun 2009 18:42 by keith1.
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Re: Overheating help
09 Jun 2009 21:36
Silver Tiger wrote: 
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.
oh my aint that purdy,rest of bike looks pretty nice also!heres a pic of that tach u can get a matching speedo too
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.
Still recovering,some days are better than others.
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Re: Overheating help
09 Jun 2009 21:57
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 
thxs for the comment
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
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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Re: Overheating help
10 Jun 2009 20:03
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
Still recovering,some days are better than others.
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Re: Overheating help
11 Jun 2009 08:20
thxs man for all the info. 
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.
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
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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