Rm60 Help!! - Motorcycle-Journal Forums

alienturtle · 02-17-2006, 02:19 AM

hello i have an 1980's RM60 that i am trying to get running. Before we took it all apart we got it started and it did run but was extreamly rich but would not move. The little jet in the carb was completly missing which explains the rich part. We were having probs with going into gear and found out a bearing went out in it. Took it all apart replaced the bearing and cleaned everything up. The piston was prity messed up. It had like 2 or 3 decent dashes down it and the sleve had a few divits in it also. We put it all back together but we cant get it to start now. No matter what i do i can take the plug out and its dry. Could it just not have enough comprestion?? whats the comprestion soposed to be?? any ideas??

Dave2122 · 02-17-2006, 11:15 PM

If the plug is dry it is not getting fuel. When a bike sits for a lonfg time the gas in the carb dries out and leaves deposits that glogg all the small passages. I recommend you strip and clean the carb and that means all the little brass bits and pieces. Use carb xlean and compressed air. careful not to loose any of the bits.

alienturtle · 02-19-2006, 12:59 AM

ya i just did that today and totally cleaned it all out ima try it tommarrow. On my carb the cap screws off and the cup slides out with spring and all. does anyone know what the stock highth is soposed to be on that little clip?? like this one

http://cgi.ebay.com/ebaymotors/1979-...ayphotohosting

Dave2122 · 02-19-2006, 10:40 PM

Most of the time they are set in the middle groove. I suggest you try it there first.

alienturtle · 02-22-2006, 11:00 PM

i cleaned my entire carb and set that little clip. i also messed with the float valves and the tab was bent so far down it was shutting fuel off way to fast. so i bent that back and got it running pritty darn good idles and all. clutch works and it shifts just fine. but after about 15-20 min of ridding it begins to bog down and just get worse and worse untill it wont start at all. i pull the plug and it is black and wet like its all fouled out. no matter what i do i cant get it run again. ill clean the plug and it will start but after about 5 sec just die and the plug is all fouled again. the only way i can get it running again is a whole new plug. any other ideas?? thanks

Dave2122 · 02-24-2006, 01:48 PM

Ok now that it will run you need to adjust your jetting. You can do this first by adjusting your air screw and needle height.

Air Screw turned clockwise is Richer (More Fuel) Counter Clockwise is Leaner (Less Fuel)

Needle Jet Clip adjust top groove is leanest and bottom groove is richest.

You should look at the main jet and read the number stamped on it. The lower the number the leaner and the higher the nuber the richer.

Keep in mind the outside air temp affects jetting. If it is cold your fuel mix will be richer as cold air carries more fuel. The ideal temp to jet a bike is 70 degrees.

alienturtle · 02-26-2006, 02:29 AM

ok sounds good ill try that. right now i have the clip on the second notch from bottom so ill try and move it up one to lean it out a bit. ill put a new plug in it and see how it does. on the little air screw how many turns out should i start at??? thanks man for all the help

02-17-2006, 02:19 AM	#1 (permalink)
alienturtle Newbie Joined: Feb 2006 Posts: 7	Rm60 Help!! hello i have an 1980's RM60 that i am trying to get running. Before we took it all apart we got it started and it did run but was extreamly rich but would not move. The little jet in the carb was completly missing which explains the rich part. We were having probs with going into gear and found out a bearing went out in it. Took it all apart replaced the bearing and cleaned everything up. The piston was prity messed up. It had like 2 or 3 decent dashes down it and the sleve had a few divits in it also. We put it all back together but we cant get it to start now. No matter what i do i can take the plug out and its dry. Could it just not have enough comprestion?? whats the comprestion soposed to be?? any ideas??

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02-17-2006, 11:15 PM	#2 (permalink)
Dave2122 Sprocket Pilot Joined: Sep 2004 Bike: Which one of the 9? Location: USA Posts: 887	If the plug is dry it is not getting fuel. When a bike sits for a lonfg time the gas in the carb dries out and leaves deposits that glogg all the small passages. I recommend you strip and clean the carb and that means all the little brass bits and pieces. Use carb xlean and compressed air. careful not to loose any of the bits.

02-19-2006, 12:59 AM	#3 (permalink)
alienturtle Newbie Joined: Feb 2006 Posts: 7	ya i just did that today and totally cleaned it all out ima try it tommarrow. On my carb the cap screws off and the cup slides out with spring and all. does anyone know what the stock highth is soposed to be on that little clip?? like this one http://cgi.ebay.com/ebaymotors/1979-...ayphotohosting

02-19-2006, 10:40 PM	#4 (permalink)
Dave2122 Sprocket Pilot Joined: Sep 2004 Bike: Which one of the 9? Location: USA Posts: 887	Most of the time they are set in the middle groove. I suggest you try it there first.

02-22-2006, 11:00 PM	#5 (permalink)
alienturtle Newbie Joined: Feb 2006 Posts: 7	i cleaned my entire carb and set that little clip. i also messed with the float valves and the tab was bent so far down it was shutting fuel off way to fast. so i bent that back and got it running pritty darn good idles and all. clutch works and it shifts just fine. but after about 15-20 min of ridding it begins to bog down and just get worse and worse untill it wont start at all. i pull the plug and it is black and wet like its all fouled out. no matter what i do i cant get it run again. ill clean the plug and it will start but after about 5 sec just die and the plug is all fouled again. the only way i can get it running again is a whole new plug. any other ideas?? thanks

02-24-2006, 01:48 PM	#6 (permalink)
Dave2122 Sprocket Pilot Joined: Sep 2004 Bike: Which one of the 9? Location: USA Posts: 887	Ok now that it will run you need to adjust your jetting. You can do this first by adjusting your air screw and needle height. Air Screw turned clockwise is Richer (More Fuel) Counter Clockwise is Leaner (Less Fuel) Needle Jet Clip adjust top groove is leanest and bottom groove is richest. You should look at the main jet and read the number stamped on it. The lower the number the leaner and the higher the nuber the richer. Keep in mind the outside air temp affects jetting. If it is cold your fuel mix will be richer as cold air carries more fuel. The ideal temp to jet a bike is 70 degrees.

02-26-2006, 02:29 AM	#7 (permalink)
alienturtle Newbie Joined: Feb 2006 Posts: 7	ok sounds good ill try that. right now i have the clip on the second notch from bottom so ill try and move it up one to lean it out a bit. ill put a new plug in it and see how it does. on the little air screw how many turns out should i start at??? thanks man for all the help

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