Planet Minis

KCL · 02-21-2007, 07:19 AM

Taking a look at a bike for a friend, had a recent to end job from the dealer. The bike ran for awhile, then started cutting out. Now it doesn't want to start and when it does it just can't rev up. I checked;air filter, gas flow, compression, and verified the spark while kicking it over. Could it still be something electrical "coil" maybe, or what should I do next ? Thanks.

Franky · 02-21-2007, 08:24 AM

Check the coil and then check the reeds. Is the gas old or an incorrect mixture? You may also want to take the carb apart and clean it good. Make sure the jets are clear of obstructions. Those are some things to start with. Its hard to solve a problem like this when the bike isnt in front of me. Good Luck

Frank

KCL · 02-21-2007, 09:02 AM

OK, so how/what is the correct way to verify if the coil is good. Do check resistance and continuity ?

Franky · 02-21-2007, 01:16 PM

Can you pull the plug, ground it against the cylinder and then kick the bike over. While you are kicking it over you should see spark.

KCL · 02-21-2007, 03:15 PM

Yep, have spark when grounded against the engine.

turboglenn · 02-21-2007, 03:18 PM

even with spark the plug could be fouled. 2-smokes eat plugs like a fat lady at the buffet...try a new plug first, then check for loose grounds and such

yamaha · 02-21-2007, 03:25 PM

yea check the plug

phatmini · 02-21-2007, 04:03 PM

change out the plug and how long have you ridden it is it broken i yet cause dealers mix the fuel really rich might wan to drain it and mix what you would normally also if it still happens check the reeds they may need to be replaced good luck

KCL · 02-22-2007, 05:41 PM

Yep new plug installed, not starting. Pulling the carb off now, has to be fuel related....maybe the reeds are not right.....we'll see.

phatmini · 02-22-2007, 06:46 PM

Quote:

Originally Posted by KCL

Yep new plug installed, not starting. Pulling the carb off now, has to be fuel related....maybe the reeds are not right.....we'll see.

if the reeds are open just a little bit you can kick that thing all day long and it will never start i had it happen to me just take them out and flip them over and that should work unless they are chipped or broken

Franky · 02-22-2007, 07:29 PM

Flipping them over is a good idea to see if they are the problem but make sure you do replace them in the very near future. They do not last nearly as long after you flip them.

Frank

KCL · 02-23-2007, 01:58 PM

Took apart the carb and reeds, inspected both. They seemed fine. Took the exhaust pipe off, found coolant collected in the first bend of the pipe. Looks like the head gasket is leaking bye........

rusky · 04-03-2007, 09:28 PM

i would take it to the dealer if this top end job was recent.... I always do top ends on my 125 and never had it blow a head gasket and i revv the piss out of it.

dilbert · 04-09-2007, 07:19 PM

it sounds like u have stuck floats. if the reeds are good and u have spark then u should be able to get it started. it should start with coolant in it unless theres tons of it. make sure u have the pilot circuit comletly clean

yellowrider · 04-18-2007, 01:03 PM

my 85 goes through plugs all the time, espically if your mix is rich.. Oh make sure your running 92 octane. It really needs it.
Those cr 85 will take a beating tho and ask for more. Ive crossed small rivers and even lost it once in a mud/pond completely drowning my bike. Oil change is all I really had to do, clean motor a bit but still impressed I didnt mess nothing up.

AndRenner · 04-18-2007, 08:18 PM

my old cr80 use to go thro plugs like no other, i would order 10 at a time and after every weekend put a new one on.

foxrider259 · 04-29-2007, 10:15 PM

Quote:

Originally Posted by KCL

Taking a look at a bike for a friend, had a recent to end job from the dealer. The bike ran for awhile, then started cutting out. Now it doesn't want to start and when it does it just can't rev up. I checked;air filter, gas flow, compression, and verified the spark while kicking it over. Could it still be something electrical "coil" maybe, or what should I do next ? Thanks.

its most likly the piston i had the same problem try to change the piston

foxrider259 · 04-29-2007, 10:17 PM

its most likly the piston i had the same problem change the piston

xr80david · 05-13-2007, 11:33 PM

Wow!

My CR85 is ultra-reliable! I hardly go through plugs at all, and I run 32:1, not too rich but still. I've fouled 3 plugs total since I bought it at the beggining of 05'...

Paxracing · 05-14-2007, 04:29 PM

went you pulled the plug out was it wet ?

02-21-2007, 07:19 AM	#1 (permalink)
KCL 1st Gear Member Join Date: Aug 2004 Posts: 212	CR85 Problems, won't run! Taking a look at a bike for a friend, had a recent to end job from the dealer. The bike ran for awhile, then started cutting out. Now it doesn't want to start and when it does it just can't rev up. I checked;air filter, gas flow, compression, and verified the spark while kicking it over. Could it still be something electrical "coil" maybe, or what should I do next ? Thanks.

05-14-2007, 04:29 PM	#20 (permalink)
Paxracing Advertiser Join Date: Mar 2004 Location: ca Posts: 3,057	Re: CR85 Problems, won't run! went you pulled the plug out was it wet ? __________________ WWW.PAXRACINGSTORE.COM (818) 897-0373 EMAIL PAXRACING@AOL.COM IF YOU DONT SEE IT JUST E MAIL _________________________________

02-21-2007, 08:24 AM	#2 (permalink)
Franky 1st Gear Member Join Date: Dec 2005 Location: Westland, Michigan Posts: 169	Check the coil and then check the reeds. Is the gas old or an incorrect mixture? You may also want to take the carb apart and clean it good. Make sure the jets are clear of obstructions. Those are some things to start with. Its hard to solve a problem like this when the bike isnt in front of me. Good Luck Frank

02-21-2007, 09:02 AM	#3 (permalink)
KCL 1st Gear Member Join Date: Aug 2004 Posts: 212	OK, so how/what is the correct way to verify if the coil is good. Do check resistance and continuity ?

02-21-2007, 01:16 PM	#4 (permalink)
Franky 1st Gear Member Join Date: Dec 2005 Location: Westland, Michigan Posts: 169	Can you pull the plug, ground it against the cylinder and then kick the bike over. While you are kicking it over you should see spark.

02-21-2007, 03:15 PM	#5 (permalink)
KCL 1st Gear Member Join Date: Aug 2004 Posts: 212	Yep, have spark when grounded against the engine.

02-21-2007, 03:18 PM	#6 (permalink)
turboglenn 3rd Gear Member Join Date: Jul 2005 Location: Omaha, NE Posts: 1,928	even with spark the plug could be fouled. 2-smokes eat plugs like a fat lady at the buffet...try a new plug first, then check for loose grounds and such

02-21-2007, 03:25 PM	#7 (permalink)
yamaha 3rd Gear Member Join Date: Jul 2006 Location: locust grove, va Posts: 2,056	yea check the plug

02-21-2007, 04:03 PM	#8 (permalink)
phatmini 2nd Gear Member Join Date: Jan 2006 Location: halifax,mass Posts: 462	change out the plug and how long have you ridden it is it broken i yet cause dealers mix the fuel really rich might wan to drain it and mix what you would normally also if it still happens check the reeds they may need to be replaced good luck

02-22-2007, 05:41 PM	#9 (permalink)
KCL 1st Gear Member Join Date: Aug 2004 Posts: 212	Yep new plug installed, not starting. Pulling the carb off now, has to be fuel related....maybe the reeds are not right.....we'll see.

02-22-2007, 07:29 PM	#11 (permalink)
Franky 1st Gear Member Join Date: Dec 2005 Location: Westland, Michigan Posts: 169	Flipping them over is a good idea to see if they are the problem but make sure you do replace them in the very near future. They do not last nearly as long after you flip them. Frank

02-23-2007, 01:58 PM	#12 (permalink)
KCL 1st Gear Member Join Date: Aug 2004 Posts: 212	Took apart the carb and reeds, inspected both. They seemed fine. Took the exhaust pipe off, found coolant collected in the first bend of the pipe. Looks like the head gasket is leaking bye........

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04-03-2007, 09:28 PM	#13 (permalink)
rusky 2nd Gear Member Join Date: Nov 2006 Posts: 333	i would take it to the dealer if this top end job was recent.... I always do top ends on my 125 and never had it blow a head gasket and i revv the piss out of it.

04-09-2007, 07:19 PM	#14 (permalink)
dilbert PM Newbie Join Date: Apr 2007 Posts: 9	it sounds like u have stuck floats. if the reeds are good and u have spark then u should be able to get it started. it should start with coolant in it unless theres tons of it. make sure u have the pilot circuit comletly clean

04-18-2007, 01:03 PM	#15 (permalink)
yellowrider 1st Gear Member Join Date: Apr 2007 Location: Frozen in Time MN Posts: 235	my 85 goes through plugs all the time, espically if your mix is rich.. Oh make sure your running 92 octane. It really needs it. Those cr 85 will take a beating tho and ask for more. Ive crossed small rivers and even lost it once in a mud/pond completely drowning my bike. Oil change is all I really had to do, clean motor a bit but still impressed I didnt mess nothing up.

04-18-2007, 08:18 PM	#16 (permalink)
AndRenner 3rd Gear Member Join Date: Sep 2006 Location: Sacramento, CA Posts: 3,472	my old cr80 use to go thro plugs like no other, i would order 10 at a time and after every weekend put a new one on.

04-29-2007, 10:17 PM	#18 (permalink)
foxrider259 PM Newbie Join Date: Apr 2007 Posts: 3	its most likly the piston i had the same problem change the piston

05-13-2007, 11:33 PM	#19 (permalink)
xr80david 2nd Gear Member Join Date: Feb 2007 Posts: 450	Wow! My CR85 is ultra-reliable! I hardly go through plugs at all, and I run 32:1, not too rich but still. I've fouled 3 plugs total since I bought it at the beggining of 05'...