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Author Topic: Coolant overflowing from reservoir  (Read 8140 times)

BettinANDlosing

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Re: Coolant overflowing from reservoir
« Reply #15 on: May 23, 2014, 12:47:35 AM »
I have tried literally EVERYTHING but air keeps pumping into the cooling system. When I first built this motor the cam was off ( Love working on bikes at 2am tired as sh**) and I had to un-torque the head to get the cam right. So thats all I can figure other than maybe the head is warped from the previous owner, he did run it out of oil.
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2002 Kymco B&W 300; MRP 78MM "300CC", Naraku cam, Yoshimura rS3 exhaust, 17g Sliders, Yellow torque spring drilled airbox, stock carb #115 main #40 pj.

2001 "Yamaha" Zuma AKA MBK Booster; MHR OverRange, Dellorto 19mm BHBG, Polini "big" intake, RS-3 Rear shock, Stock cylinder.

mrbios

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Re: Coolant overflowing from reservoir
« Reply #16 on: May 23, 2014, 04:51:21 AM »
Quote from: BettinANDlosing on May 23, 2014, 12:47:35 AM
Love working on bikes at 2am tired as sh...

I've been in the same situation many times.  Take off the cylinder and put a straight edge across the top to check for warp.  You could also set it on a thick piece of glass.  You might want to take it to a local machine shop and have them mic the bore etc.  If it needs it they could bore and plane it back in to spec, if it's even out.

Keep us posted.  I'm thinking about installing to a 300cc kit on my GV.
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PaulC

BettinANDlosing

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Re: Coolant overflowing from reservoir
« Reply #17 on: May 23, 2014, 05:27:04 AM »
Yeah just to be safe I was planning on doing some porting and then taking to it a machine shop to level it, gain a little compression too ;)
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2002 Kymco B&W 300; MRP 78MM "300CC", Naraku cam, Yoshimura rS3 exhaust, 17g Sliders, Yellow torque spring drilled airbox, stock carb #115 main #40 pj.

2001 "Yamaha" Zuma AKA MBK Booster; MHR OverRange, Dellorto 19mm BHBG, Polini "big" intake, RS-3 Rear shock, Stock cylinder.

mrbios

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Re: Coolant overflowing from reservoir
« Reply #18 on: May 23, 2014, 07:46:07 AM »
Quote from: BettinANDlosing on May 23, 2014, 05:27:04 AM
Yeah just to be safe...

Btw, I like your quote "BettinANDlosing" is that a takeoff on Bet&Win?
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PaulC

BettinANDlosing

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Re: Coolant overflowing from reservoir
« Reply #19 on: May 23, 2014, 04:46:40 PM »
Haha yeah, I took a gamble on this bike @ $100. At the moment, the house is winning.
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2002 Kymco B&W 300; MRP 78MM "300CC", Naraku cam, Yoshimura rS3 exhaust, 17g Sliders, Yellow torque spring drilled airbox, stock carb #115 main #40 pj.

2001 "Yamaha" Zuma AKA MBK Booster; MHR OverRange, Dellorto 19mm BHBG, Polini "big" intake, RS-3 Rear shock, Stock cylinder.

mrbios

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Re: Coolant overflowing from reservoir
« Reply #20 on: May 23, 2014, 06:32:40 PM »
Quote from: BettinANDlosing on May 23, 2014, 04:46:40 PM
Haha yeah, I took a gamble on this bike @ $100...

You can part it out and get the money back in a heart beat.  Stay the course.  If the rest of the scoot is ok you will end up with a good running machine.
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PaulC

BettinANDlosing

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Re: Coolant overflowing from reservoir
« Reply #21 on: May 23, 2014, 08:28:43 PM »
No parting out for me, I'm a determined wrench head. I'll get it dialed in even if I have to go back to 250cc.
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2002 Kymco B&W 300; MRP 78MM "300CC", Naraku cam, Yoshimura rS3 exhaust, 17g Sliders, Yellow torque spring drilled airbox, stock carb #115 main #40 pj.

2001 "Yamaha" Zuma AKA MBK Booster; MHR OverRange, Dellorto 19mm BHBG, Polini "big" intake, RS-3 Rear shock, Stock cylinder.

BettinANDlosing

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Re: Coolant overflowing from reservoir
« Reply #22 on: July 03, 2014, 06:12:05 AM »
Oh my lord this it's way overdue....... I think the bet n win it's winnin!!!!! Got the cylinder head back from the machinist today, got the mating surface leveled and first testing and absolutely no rise in overflow!!!!! Got the exhaust port ported and polished a bit and it has never felt better. Now for the weekend for a long test ride, that seemed to really overflow it before.
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2002 Kymco B&W 300; MRP 78MM "300CC", Naraku cam, Yoshimura rS3 exhaust, 17g Sliders, Yellow torque spring drilled airbox, stock carb #115 main #40 pj.

2001 "Yamaha" Zuma AKA MBK Booster; MHR OverRange, Dellorto 19mm BHBG, Polini "big" intake, RS-3 Rear shock, Stock cylinder.

zombie

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Re: Coolant overflowing from reservoir
« Reply #23 on: July 03, 2014, 03:50:58 PM »
Hope you nailed it brother.
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BettinANDlosing

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Re: Coolant overflowing from reservoir
« Reply #24 on: July 03, 2014, 07:05:22 PM »
Checked the coolant this morning cold, RIGHT AT THE TOP OF THE NECK!!!!!!!!!! Usually this would be down even after a 10-15 mile ride and I rode that last night and RAPED the scooter. +2 for warped cylinder head.
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2002 Kymco B&W 300; MRP 78MM "300CC", Naraku cam, Yoshimura rS3 exhaust, 17g Sliders, Yellow torque spring drilled airbox, stock carb #115 main #40 pj.

2001 "Yamaha" Zuma AKA MBK Booster; MHR OverRange, Dellorto 19mm BHBG, Polini "big" intake, RS-3 Rear shock, Stock cylinder.

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