Author Topic: Aprilia Pegaso High oil pressure and over heating  (Read 2895 times)

Offline Green1

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Aprilia Pegaso High oil pressure and over heating
« on: September 17, 2016, 10:16:26 PM »
Well you have to love Italian bikes I stopped using it a few years ago because the carbs poped off.If you thought they were a bastard on a Honda try fitting them to a Peg.After stripping it down and reasembling everything It started overheat and the rad fan stopped working.As it was getting close to the red I turned the ignition key to find the bike now doesn't switch off and just keeps running.By this point the garage was rappidly filling with toxic fumes and my eye stinging like crazy.Thank god the kill switch stopped it.So I bled the rad and changed the rad switch the Fan still doesn't work unless I bridge the connection and it still overheats.Now I have discovered it has a crazy amount of oil pressure.I only noticed that because when I decidded to change the oil and the sump plug came out with a massive bang and the bike sprayed oil everywhere  :o there is now an oil stain as big as a fiat 500 on the garage floor and front of the 750.

Does anyone know whats causing the high oil pressure?
Ignition switch not turning off but only when the engines running?
Rad staying cold at the bottom?

Mick
Current bikes
Honda CB750k1 Valley Green Metallic
Honda CB750k1 Candy Gold
Honda CB550k Candy Jade Green
Honda CG125
Aprilia Pegaso 650
Moto guzzi 1200 sport
Kawasaki EX650R (Mine until dave pays for it)
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Offline Nurse Julie

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Re: Aprilia Pegaso High oil pressure and over heating
« Reply #1 on: September 17, 2016, 10:26:16 PM »
I don't know the answer to any if those problems but, that is one of the funniest posts I have read in a long time 😃😃😃😃 Oh yes, cold rad at the bottom means air in system,so bleed it xx
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Offline Trigger

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Re: Aprilia Pegaso High oil pressure and over heating
« Reply #2 on: September 17, 2016, 10:31:02 PM »
I don't know why you did not put that bike in as PX for the 550 and give someone else the problem  ;D ;D ;D

Offline Green1

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Re: Aprilia Pegaso High oil pressure and over heating
« Reply #3 on: September 17, 2016, 10:36:55 PM »
It's a bike I can't part with I got when I was 18 and the only big bike I could have at the time because my mum wouldn't let me have a ZXR400.It's like family constantly disapoints but your stuck with it for life. ;D
I have bled the rad over and over I think it may be blocked.
Current bikes
Honda CB750k1 Valley Green Metallic
Honda CB750k1 Candy Gold
Honda CB550k Candy Jade Green
Honda CG125
Aprilia Pegaso 650
Moto guzzi 1200 sport
Kawasaki EX650R (Mine until dave pays for it)
Kawasaki ZXR400 J

Offline hairygit

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Re: Aprilia Pegaso High oil pressure and over heating
« Reply #4 on: September 17, 2016, 10:42:11 PM »
 ;D ;D ;D ;D ;D ;D ;D ;D ;D ;D ;D ;D ;D ;D ;D ;D ;D ;D ;D ;D ;D ;D ;D ;D ;D ;D ;D ;D ;D ;D ;D, Yep, as you freely admit, MUPPET!
If it's got tits or wheels, it's hassle, if it's got both, RUN!!!

Offline hairygit

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Re: Aprilia Pegaso High oil pressure and over heating
« Reply #5 on: September 17, 2016, 10:53:57 PM »
Just had a thought. Julie, you must with all your time in hospitals know a half decent shrink that could help this guy, I mean, he says you have to love shitalian bikes??? Say that too often he'll get sectioned anyway! ;) ;D ;D ;D ;D ;D ;D ;D ;D ;D ;D ;D ;D ;D ;D
If it's got tits or wheels, it's hassle, if it's got both, RUN!!!

Offline Nurse Julie

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Re: Aprilia Pegaso High oil pressure and over heating
« Reply #6 on: September 17, 2016, 10:57:35 PM »
I thought he had been sectioned Hairy and was out on weekend leave 😃😃😃.
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LINK TO MY CB400/4 ENGINE STRIP / ASSESSMENT AND REBUILD...NOW COMPLETE
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Offline Green1

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Re: Aprilia Pegaso High oil pressure and over heating
« Reply #7 on: September 17, 2016, 11:10:21 PM »
I wish I can't find anyone to put up with me.
Current bikes
Honda CB750k1 Valley Green Metallic
Honda CB750k1 Candy Gold
Honda CB550k Candy Jade Green
Honda CG125
Aprilia Pegaso 650
Moto guzzi 1200 sport
Kawasaki EX650R (Mine until dave pays for it)
Kawasaki ZXR400 J

Offline MarkCR750

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Re: Aprilia Pegaso High oil pressure and over heating
« Reply #8 on: September 18, 2016, 04:22:57 PM »
On that point of not being able to switch it off, I once test drove a 944 on a blazing hot July day, getting into the car it was like a furnace (black car), I drove off and found the heater was stuck full on, tried to open the windows they didn't work, tried the sunroof, it didn't work, stopped went to open the door and the door pull snapped!, Jesus I've never been so hot in my life!, eventually I crawled out of the passenger door, I didn't buy it 😄
PS Hairygit I believe your are the one with mental health issues given your irrational hatred of Italian bikes which are in fact glorious machines! 😜
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Ducati 900SS (Soul & Speed)
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James Captain 197 (pure adrenaline, i.e. no brakes!)
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Offline ST1100

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Re: Aprilia Pegaso High oil pressure and over heating
« Reply #9 on: September 18, 2016, 06:09:00 PM »
Does anyone know whats causing the high oil pressure?
Presumably a blocked case vent...
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Offline Green1

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Re: Aprilia Pegaso High oil pressure and over heating
« Reply #10 on: November 10, 2016, 09:07:55 PM »
Well it turns out the bike has been off the road for four years but its back and running perfect  :) :)
Not only did the carbs pop off but there was a tiny coolant pipe between the header pipes that was blocked solid
I had to strip the bike to a rolling frame to get to it but its done now.Thank god so fingers crossed I get a full year out of the bike before it plays up again.  ::)
Current bikes
Honda CB750k1 Valley Green Metallic
Honda CB750k1 Candy Gold
Honda CB550k Candy Jade Green
Honda CG125
Aprilia Pegaso 650
Moto guzzi 1200 sport
Kawasaki EX650R (Mine until dave pays for it)
Kawasaki ZXR400 J

Offline MarkCR750

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Re: Aprilia Pegaso High oil pressure and over heating
« Reply #11 on: November 10, 2016, 11:11:43 PM »
Viva l'Italia !
Suzuki GT250A (Nostalgia)
1977 K7 CR750 (lookalike, what of I’m not sure)
Ducati 900SS (Soul & Speed)
Ducati M900 Monster (Handling & character)
Thruxton 1200 (suits me)
James Captain 197 (pure adrenaline, i.e. no brakes!)
"Eff yir gitten awvestear yir gooin te farst"
Sir J.Stewart.

Offline Green1

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Re: Aprilia Pegaso High oil pressure and over heating
« Reply #12 on: November 13, 2016, 06:39:08 PM »
Just an update running well I'v now covered about 80 miles and only lost about a pint of oil.Its not gone to far though its mostly on my boot and front tyre.Oh and burnt a hole in the wiring loom.
So not to bad a day really  :)
Current bikes
Honda CB750k1 Valley Green Metallic
Honda CB750k1 Candy Gold
Honda CB550k Candy Jade Green
Honda CG125
Aprilia Pegaso 650
Moto guzzi 1200 sport
Kawasaki EX650R (Mine until dave pays for it)
Kawasaki ZXR400 J

Offline Trigger

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Re: Aprilia Pegaso High oil pressure and over heating
« Reply #13 on: November 13, 2016, 06:54:50 PM »
Sounds like fun Mick, at least you got 80 miles out of it  :) Which I am very surprised you got more than 8  ;D

Offline Green1

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Re: Aprilia Pegaso High oil pressure and over heating
« Reply #14 on: November 13, 2016, 07:00:28 PM »
I'm as suprised as you last time it was on the road I only covered around 50miles before it stopped and I declared it SORN thinking it was going to be termanal.
Current bikes
Honda CB750k1 Valley Green Metallic
Honda CB750k1 Candy Gold
Honda CB550k Candy Jade Green
Honda CG125
Aprilia Pegaso 650
Moto guzzi 1200 sport
Kawasaki EX650R (Mine until dave pays for it)
Kawasaki ZXR400 J

 

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