oil/air cooled motors, bandit for example

[Keir]

How do they keep cool in heavy traffic etc? Unlike wc bikes that have a fan etc.
Can they overheat? should different oils be used as its for cooling aswell?

discuss...
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Current : '08 Yamaha FZ1s
Previous: '99 Honda CBR 600FX, 03 ZX636 B1H, 99 Fazer 600 (red), 02 GSX-R 600 K2, 00 SV650s (red), 2008 ZX10R, 97 Bandit 1200N, 04 ZX6RR K1H, 04 GSX-R 1000, 98 Fazer 600 (gold), 05 Madness 110 Pit bike, 04 CR125R, 00 SV650s (black), 06 KTM 625 SMC, 99 SRAD 600 track bike, 03 SV650, 98 Bandit 1200N, Bandit 600SY, 03 GSX-R 600 K3, 01 GSX-R 600, 01 Fazer 600 (black), VFR 400 NC30 x3, 78 Honda Dream, 00 Speedfight 50

[Wafer_Thin_Ham]

[doggone]

Probably just have more spare capacity.?
Rode my bandit1200 in european cities at almost 40C with no ill effects.
Since bikes are pretty much the same design to be used worldwide we shouldn't have them get too hot very often in the UK.

[Keir]

but what about when they are just sitting there idling, surely its just going to get hotter and hotter until it melts?

I'll explain my reasoning... i was sitting in gridlock in central london today and it was getting very hot. it occured to me that its just going to get hotter and hotter and theres nothing i can do about it. my bandit has no temp gauge so i couldnt really tell how hot it was. surely it cant be good for the bike.
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Current : '08 Yamaha FZ1s
Previous: '99 Honda CBR 600FX, 03 ZX636 B1H, 99 Fazer 600 (red), 02 GSX-R 600 K2, 00 SV650s (red), 2008 ZX10R, 97 Bandit 1200N, 04 ZX6RR K1H, 04 GSX-R 1000, 98 Fazer 600 (gold), 05 Madness 110 Pit bike, 04 CR125R, 00 SV650s (black), 06 KTM 625 SMC, 99 SRAD 600 track bike, 03 SV650, 98 Bandit 1200N, Bandit 600SY, 03 GSX-R 600 K3, 01 GSX-R 600, 01 Fazer 600 (black), VFR 400 NC30 x3, 78 Honda Dream, 00 Speedfight 50

[Jamie S]

Every Sunday my Air cooled honda TLR200 Trials bike has the engine running for around 4 to 5 hours non stop, Never going more than about 10 mph and often just sitting waiting to do the sections.

It never over heats and is fine , don't worry about it mate.

[Blau Zedong]

The air / oil cooled GSXR750's get a bit warm in traffic on a hot day, but that's all. They hold alot of oil for a good reason.....
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18:54:48 Rob Fzs: jews don't give away stuff for free

18:54:59 Rob Fzs: unless its their clothes/ hair/ golden teeth

[bish777]

Oilcooled bikes (PROPER GSXRs, B6/12, GSXF) use an effective oil jet system and a large amount of oil so therefore actually stay pretty cool for an extended time at standstill. Certainly not enough to worry about a bit of traffic. They dont need much windspeed to get effective colling from the radiator.

Aircooled motors vary, My FJ1200 didnt like heavy traffic and would overheat fairly quickly. However most other aircooled bikes seem to be more or less unaffected.
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GSXR1100J

[Keir]

ok i wont worry about it, now im interested how it does cool the engine.
Is it just the oil circulates and where theres a fair bit in there it warms while in the engine then cools in the sump until circulated again?
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Current : '08 Yamaha FZ1s
Previous: '99 Honda CBR 600FX, 03 ZX636 B1H, 99 Fazer 600 (red), 02 GSX-R 600 K2, 00 SV650s (red), 2008 ZX10R, 97 Bandit 1200N, 04 ZX6RR K1H, 04 GSX-R 1000, 98 Fazer 600 (gold), 05 Madness 110 Pit bike, 04 CR125R, 00 SV650s (black), 06 KTM 625 SMC, 99 SRAD 600 track bike, 03 SV650, 98 Bandit 1200N, Bandit 600SY, 03 GSX-R 600 K3, 01 GSX-R 600, 01 Fazer 600 (black), VFR 400 NC30 x3, 78 Honda Dream, 00 Speedfight 50

[bish777]

The GSXR750/1100 motor (which is also in the Bandits, GSXFs and a few others) hold alot of oil, which is circulated around the motor under fairly high pressure. The cylinder head gets a high pressure supply where the oil is sprayed all over the top end, aiding head cooling and lubrication. There are also oil sprays that spray the bottom of the pistons keeping cylinder tempratures low.

I dont know about the B6 but the GSXRs have a large radiator that the oil passes through-this provides the majority of the cooling for the oil, the fins on the motor are more decoration really.

Suzuki designed this system for the original GSXR 750 as at the time watercooling would have made the engine heavier and larger. Also it allows you to keep the engine light-compare a GSXR1100 engine to the old aircooled katana/GSX engine which is HUGE by comparison.
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GSXR1100J

[doggone]

Just a thought, if you think it's getting hotter than you noticed before, it may not be circulating the oil so well.
Filter and oil change might be overdue?

[Kickstart]

[SonicTheHedge...]

You've also got to remember that the hotter the bike gets the faster the bike will transfer heat away, so whilst it heats up quickly at standstill it'll level out (unless you're sat there with the throttle pinned, of course... ).
The B6 has a nice oil cooler bolted to the front to chuck away a decent chunk of heat, after all.
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Previous: '00 G2 Bandit 600 Naked. Now: '08 BMW GS Adventure.

[iooi]

[Nath]

My XS750 is aircooled and doesn't like running stationary at all. Had it get so hot that when I stalled it I could barely turn the engine over via the kickstarter. The later 850cc model had a oilcooler, I fitted this to my 750 and it deals with slow speeds much better now. Think the extra oil capacity alone makes a massive difference.

My aircooled cb550 is pretty resiliant, but I have had it near to siezing a few times (all the oil on the outside of the engine starts burning off, and it gets very hard to kick over).

On both bikes, if I get caught in traffic I will turn the motors off whenever I get stopped at lights. On a motorway run on the xs750 outfit last month, the A1(M) was totally chocka and I had to stop on the hard shaulder several times to wait till the traffic started moving fast enough to warrant getting back in it.
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Hard livin', hard luck.

[Noxious89123]

Was out riding quite "spiritedly" then had to slow down and stop in traffin stow...

Temp gauge quite steadily upto about 3/4 on the gauge.. usually sits just under the 1/4 position.... Needless to say i was shitting bricks that something was wrong with the bike, but i could see no damage or water leaks...

As soon as i got out of the traffic and got her moving again she cooled back down to normal in the space of about 30 seconds!
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'06 Honda CBR125RW-6 ~ '00 Honda CBR600F-Y ~ '07 Honda CBR600RR-7 ~ Bikeless
'53 Ford Ka 1.3 ~ '03 Vauxhall Astra SRi 1.8 ~ '52 Vauxhall Astra SRi 2.2 ~ '53 Vauxhall Astra GSi

[virus]

the z overheated and heat siezed the day i got it,

bastard throwasiki

Cheers
John
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own: 81 xs1100g...
owned: 85 rat CG (sold), 91 GS500e (stolen), 84 gsx400f (scrapped), 81 z250 (siezed, siezed, scrapped), 83 cb250rs (sold), 84 gpz750r ratfighter (killed) 84gpz400 (sold), '80 cb650 ratfighter (wrote off) 95gsx6/12f ratfighter (killed) 91 xj900 (sold)
stinkwheel Well I just had my hands up a pigs fanny. Which makes your concerns pale into insignificance.

[Polarbear]

Motor manufacturing clearances on liquid cooled bikes are much closer than on air cooled bikes.

The larger clearances allow for the much the larger coefficients of expansion of the components due to to the larger temperature range on an air cooled bike.

This was very noticable on early Yam and KwaK 2 strokes that used to rattle noticably more when cold than when at normal temperature.

It also the reason why liquid cooled bike usually last longer with less major engine maintenance than air cooled bikes.

Low tuned large capacity bikes like the FJ1200 being an exception before you all slaughter me
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Triumph Trophy Launch Edition

[bish777]

[bigbike-r]

the oil cooled motors
in this pic you can see the oil - highlighted orange for obviouse reasons... the engine holds a good ammount of oil and serves 2 purpouses 1- to lubricate the engine and 2 to cool down the oil is picked up from the sump of the motor and up behind the ricker cover where it goes down passages and is released through the top of the head and back down through the oil cooler youll notice your motor has the fins on too whereas the watercooleds dont this is to aid in the air cooling heat away from the engine i wouldnt worry about your motor overheating its never gonna get that hot - though it is possible to add a secondry oil cooler as was run on the yoshimura tornado wich i am in the process of doing on my gsxr - at the back of the motor between the catbs youll see a Y shaped oil line connecting to the rocker cover ... yoshimura make the fittings for this but they can be fabricated using the origionals. with the new fittings , one hose goes from that bottom connection to one side of another cooler and the 2 from the rocker cover are joined by a 3 way connector leading them into 1 seperate pipe wich attatches to the other side of the cooler... they can be mounted in the nose cone or if your using it on the road or need a light in there most people mount them under the existing cooler

[Keir]

very helpful, thanks
____________________
Current : '08 Yamaha FZ1s
Previous: '99 Honda CBR 600FX, 03 ZX636 B1H, 99 Fazer 600 (red), 02 GSX-R 600 K2, 00 SV650s (red), 2008 ZX10R, 97 Bandit 1200N, 04 ZX6RR K1H, 04 GSX-R 1000, 98 Fazer 600 (gold), 05 Madness 110 Pit bike, 04 CR125R, 00 SV650s (black), 06 KTM 625 SMC, 99 SRAD 600 track bike, 03 SV650, 98 Bandit 1200N, Bandit 600SY, 03 GSX-R 600 K3, 01 GSX-R 600, 01 Fazer 600 (black), VFR 400 NC30 x3, 78 Honda Dream, 00 Speedfight 50