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Airfilter & Oil
- pusher
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19 Aug 2010 15:43 #392213
by pusher
Airfilter & Oil was created by pusher
Hey guys, I have a 1980 kz550 ltd.
I just recently ripped some junk pods off the carbs and purchased a used air box. I connected the air-breather from the engine case to the bottom of the air box when I installed it. The funny thing is, I have oil in the bottom of my airbox now. Does anyone know why that is?
What is the benefit to having the breather hose connected to my filter box, as opposed to running a rubber tube to the outside of the bike, like the carb overflow hoses do?
I just recently ripped some junk pods off the carbs and purchased a used air box. I connected the air-breather from the engine case to the bottom of the air box when I installed it. The funny thing is, I have oil in the bottom of my airbox now. Does anyone know why that is?
What is the benefit to having the breather hose connected to my filter box, as opposed to running a rubber tube to the outside of the bike, like the carb overflow hoses do?
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- Motor Head
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19 Aug 2010 15:47 #392217
by Motor Head
1982 KZ1000LTD K2 Vance & Hines 4-1 ACCEL COILS Added Vetter fairing & Bags. FOX Racing rear Shocks, Braced Swing-arm, Fork Brace, Progressive Fork Springs RT Gold Emulators, APE Valve Springs, 1166 Big Bore kit, RS34's, GPZ cams.
1980 KZ550LTD C1 Stock SOLD Miss it
1979 MAZDA RX7 in the works, 13B...
Replied by Motor Head on topic Airfilter & Oil
Possibly overfull on oil in the crankcase, also blow-by past the piston rings will cause this.
1982 KZ1000LTD K2 Vance & Hines 4-1 ACCEL COILS Added Vetter fairing & Bags. FOX Racing rear Shocks, Braced Swing-arm, Fork Brace, Progressive Fork Springs RT Gold Emulators, APE Valve Springs, 1166 Big Bore kit, RS34's, GPZ cams.
1980 KZ550LTD C1 Stock SOLD Miss it
1979 MAZDA RX7 in the works, 13B...
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- TexasKZ
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19 Aug 2010 15:49 #392219
by TexasKZ
1982 KZ1000 LTD parts donor
1981 KZ1000 LTD awaiting resurrection
2000 ZRX1100 not ridden enough
Replied by TexasKZ on topic Airfilter & Oil
A fine mist of oil is normal, but if it is more than that, likely causes are ring blow-by or a grossly over-filled crankcase. I believe the main advantage to venting into the air box is a reduced likelihood of dirt and such entering the engine through the vent. Then there's that air pollution bidness............
1982 KZ1000 LTD parts donor
1981 KZ1000 LTD awaiting resurrection
2000 ZRX1100 not ridden enough
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20 Aug 2010 00:22 #392380
by pusher
Replied by pusher on topic Airfilter & Oil
Yeah, I'm doubting that I have too much oil in the bike, but that is a much more desirable possibility than blow by. I totally forgot about that. So I would connect an air compressor up to the spark plug port and turn the timing bolt till I had the highest possible pressure, and then listen for gurgling or hissing in my case... yes?
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20 Aug 2010 08:51 #392445
by TexasKZ
1982 KZ1000 LTD parts donor
1981 KZ1000 LTD awaiting resurrection
2000 ZRX1100 not ridden enough
Replied by TexasKZ on topic Airfilter & Oil
That will work. If the 550 is like the litre engines, be sure to turn the engine over with the large nut, not the small one.
1982 KZ1000 LTD parts donor
1981 KZ1000 LTD awaiting resurrection
2000 ZRX1100 not ridden enough
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- Motor Head
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20 Aug 2010 09:02 #392450
by Motor Head
1982 KZ1000LTD K2 Vance & Hines 4-1 ACCEL COILS Added Vetter fairing & Bags. FOX Racing rear Shocks, Braced Swing-arm, Fork Brace, Progressive Fork Springs RT Gold Emulators, APE Valve Springs, 1166 Big Bore kit, RS34's, GPZ cams.
1980 KZ550LTD C1 Stock SOLD Miss it
1979 MAZDA RX7 in the works, 13B...
Replied by Motor Head on topic Airfilter & Oil
A compression test, followed by a leak down test if low, will determine where the problem lies. Here's a HF link to a leak down tester.
www.harborfreight.com/automotive-motorcy...wn-tester-94190.html
+1 on the 17mm large nut on the right hand end of the crank for hand turning. You need to place each piston at Top Dead Center Firing position to check with the leak down tester or your compressed air. If the air is already applied, you won't turn it far, or it will turn its self, with your wrench and hand on there it might get nasty.
www.harborfreight.com/automotive-motorcy...wn-tester-94190.html
+1 on the 17mm large nut on the right hand end of the crank for hand turning. You need to place each piston at Top Dead Center Firing position to check with the leak down tester or your compressed air. If the air is already applied, you won't turn it far, or it will turn its self, with your wrench and hand on there it might get nasty.
1982 KZ1000LTD K2 Vance & Hines 4-1 ACCEL COILS Added Vetter fairing & Bags. FOX Racing rear Shocks, Braced Swing-arm, Fork Brace, Progressive Fork Springs RT Gold Emulators, APE Valve Springs, 1166 Big Bore kit, RS34's, GPZ cams.
1980 KZ550LTD C1 Stock SOLD Miss it
1979 MAZDA RX7 in the works, 13B...
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- TeK9iNe
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20 Aug 2010 09:18 - 20 Aug 2010 09:20 #392455
by TeK9iNe
Motorcycle Shop Owner/Operator
79 Kawie Z1000 LTD
81 Kawie Z1000 CSR
83 Honda VT750C A
85 Kawie GPZ900 A2
86 Zukie GS1150 EG
93 Yamie XV1100 E
Lucky to have rolled many old bikes through my doors
Replied by TeK9iNe on topic Airfilter & Oil
You will always get some blow-by with a leak down test, as it is just air passing the ring gaps. Listen and check for same constant pressure with constant input pressure. If one cylinder is much lower, then you have an issue.
Don't use too much air pressure, as this can cause the crank to suddenly twist and possibly wreck the end bolt or you with whatever tool you have on there.
Don't use more oil than 2/3 from bottom of the height of your oil window.
...and dont worry about it too much if the bike screams. :laugh:
The harbor Freight leak down tester is JUNK! I owned it! Go with Snap-on, its $$$, but works fantastic.
Don't use too much air pressure, as this can cause the crank to suddenly twist and possibly wreck the end bolt or you with whatever tool you have on there.
Don't use more oil than 2/3 from bottom of the height of your oil window.
...and dont worry about it too much if the bike screams. :laugh:
The harbor Freight leak down tester is JUNK! I owned it! Go with Snap-on, its $$$, but works fantastic.
Motorcycle Shop Owner/Operator
79 Kawie Z1000 LTD
81 Kawie Z1000 CSR
83 Honda VT750C A
85 Kawie GPZ900 A2
86 Zukie GS1150 EG
93 Yamie XV1100 E
Lucky to have rolled many old bikes through my doors
Last edit: 20 Aug 2010 09:20 by TeK9iNe.
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20 Aug 2010 09:23 #392459
by Motor Head
1982 KZ1000LTD K2 Vance & Hines 4-1 ACCEL COILS Added Vetter fairing & Bags. FOX Racing rear Shocks, Braced Swing-arm, Fork Brace, Progressive Fork Springs RT Gold Emulators, APE Valve Springs, 1166 Big Bore kit, RS34's, GPZ cams.
1980 KZ550LTD C1 Stock SOLD Miss it
1979 MAZDA RX7 in the works, 13B...
Replied by Motor Head on topic Airfilter & Oil
The reason for the use of a gauge in a leak down test is to determine not only where the pressure is escaping, but what percentage, usually of 100 psi, the cylinder will hold. Yes there is always some air that goes past the rings, but how much? This when oil is added to the cylinder via the air line fitting already in your plug hole, if using the tool.
Compression test first followed by leak down, industry standard.
Compression test first followed by leak down, industry standard.
1982 KZ1000LTD K2 Vance & Hines 4-1 ACCEL COILS Added Vetter fairing & Bags. FOX Racing rear Shocks, Braced Swing-arm, Fork Brace, Progressive Fork Springs RT Gold Emulators, APE Valve Springs, 1166 Big Bore kit, RS34's, GPZ cams.
1980 KZ550LTD C1 Stock SOLD Miss it
1979 MAZDA RX7 in the works, 13B...
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