Planet Minis

Lair · 10-20-2008, 08:03 PM

and my new CT70 fired up and immediately blew the spark plug out of the head.

It was funny for a couple of minutes, and then I tried to put the plug back in.

At least I know it will run.

Who makes a 10mm x 1 pitch spark plug insert in an 11mm length? None of the local auto parts places stock them, and the bike shops were all closed today. Any clue?

RAZZO · 10-20-2008, 08:07 PM

That sucked! Wish I could help you on the insert, but don't know. Hope it works out.

Lair · 10-20-2008, 08:18 PM

It'll really suck if I can't find an insert. I have a few extra 70 heads lying around, but I damn sure don't want to disassemble a running engine.

FastMC · 10-20-2008, 08:20 PM

A good bike shop can install a time-sert without any disassembly.

crfnaround · 10-20-2008, 08:23 PM

ive heard these are good for plug repair
++ TIME-SERT SPARK PLUG Thread Repair System ++ spark plug repair, stripped out spark plug, sparkplug thread repair, stripped thread spark plug, spark plug threads stripped, spark plug failure, spark plug defect, sparkplug spit out, spark plug proble
flange on top so you dont have to worry about screwing it down
into the combustion chamber.
gl, rob

Lair · 10-20-2008, 08:29 PM

I bookmarked that site earlier, but it was too late to call them. I'll try Fastenal and some of the local bike shops tomorrow. If they don't have them, I'll use your link. Probably won't be a bad idea to keep a few on hand.

cdoublejj · 10-20-2008, 10:20 PM

How the hell does it pop out in the first place?

Lair · 10-21-2008, 07:03 AM

Previous owner stripped it out and all the threads are gone. The bike had a new spark plug in it, so the guy had to know. That's probably why he was in such a hurry to sell it.

fatcaaat · 10-21-2008, 07:16 AM

Once I just took a head out to the next biggest sparkplug at 12mm. You can buy the plug with the proper reach.

slickz50r · 10-21-2008, 08:01 AM

Most any machine shop will have the thread insert you need.

Lair · 10-21-2008, 08:05 AM

Quote:

Originally Posted by fatcaaat

Once I just took a head out to the next biggest sparkplug at 12mm. You can buy the plug with the proper reach.

I got a PM about that too. The hole is already at 11 mm, so I may go that route.

All I need now is a 12mm x 1.0 tap.

Lair · 10-21-2008, 01:51 PM

OUCH.

Ordered a 10mm metric kit from Time-sert.

It was only $100 shipped.

FastMC · 10-21-2008, 03:30 PM

Now you can repair all your friends heads too !

Be sure and do it with both valves closed and the piston part way down the cylinder. Use lots of grease on the tap to minimize chips going in the cylinder.

Lair · 10-21-2008, 06:37 PM

I was planning to run a vacuum next to the plug hole while tapping, but the grease idea is sheer genius.

10-20-2008, 08:03 PM	#1 (permalink)
Lair 2nd Gear Member Join Date: Nov 2007 Location: Birmingham, AL (Not a native.) Posts: 406	So I rebuilt the carb, replaced and gapped the points and my new CT70 fired up and immediately blew the spark plug out of the head. It was funny for a couple of minutes, and then I tried to put the plug back in. At least I know it will run. Who makes a 10mm x 1 pitch spark plug insert in an 11mm length? None of the local auto parts places stock them, and the bike shops were all closed today. Any clue?

10-20-2008, 08:07 PM	#2 (permalink)
RAZZO Old School Z50s Join Date: Jun 2005 Location: NEW JERSEY PINELANDS Posts: 2,073 My Mood:	Re: So I rebuilt the carb, replaced and gapped the points That sucked! Wish I could help you on the insert, but don't know. Hope it works out.

10-20-2008, 08:18 PM	#3 (permalink)
Lair 2nd Gear Member Join Date: Nov 2007 Location: Birmingham, AL (Not a native.) Posts: 406	Re: So I rebuilt the carb, replaced and gapped the points It'll really suck if I can't find an insert. I have a few extra 70 heads lying around, but I damn sure don't want to disassemble a running engine.

10-20-2008, 08:20 PM	#4 (permalink)
FastMC Sporting the Merkin Join Date: Mar 2004 Location: boston area Posts: 5,275 My Mood:	Re: So I rebuilt the carb, replaced and gapped the points A good bike shop can install a time-sert without any disassembly.

10-20-2008, 08:23 PM	#5 (permalink)
crfnaround PM Newbie Join Date: Sep 2004 Location: Puyallup, WA Posts: 31	Re: So I rebuilt the carb, replaced and gapped the points ive heard these are good for plug repair ++ TIME-SERT SPARK PLUG Thread Repair System ++ spark plug repair, stripped out spark plug, sparkplug thread repair, stripped thread spark plug, spark plug threads stripped, spark plug failure, spark plug defect, sparkplug spit out, spark plug proble flange on top so you dont have to worry about screwing it down into the combustion chamber. gl, rob

10-20-2008, 08:29 PM	#6 (permalink)
Lair 2nd Gear Member Join Date: Nov 2007 Location: Birmingham, AL (Not a native.) Posts: 406	Re: So I rebuilt the carb, replaced and gapped the points I bookmarked that site earlier, but it was too late to call them. I'll try Fastenal and some of the local bike shops tomorrow. If they don't have them, I'll use your link. Probably won't be a bad idea to keep a few on hand.

10-20-2008, 10:20 PM	#7 (permalink)
cdoublejj 3rd Gear Member Join Date: Oct 2008 Location: St.Joe MO Posts: 1,485 My Mood:	Re: So I rebuilt the carb, replaced and gapped the points How the hell does it pop out in the first place?

10-21-2008, 07:03 AM	#8 (permalink)
Lair 2nd Gear Member Join Date: Nov 2007 Location: Birmingham, AL (Not a native.) Posts: 406	Re: So I rebuilt the carb, replaced and gapped the points Previous owner stripped it out and all the threads are gone. The bike had a new spark plug in it, so the guy had to know. That's probably why he was in such a hurry to sell it.

10-21-2008, 07:16 AM	#9 (permalink)
fatcaaat 3rd Gear Member Join Date: Sep 2004 Location: Arlington, VA Posts: 3,988	Re: So I rebuilt the carb, replaced and gapped the points Once I just took a head out to the next biggest sparkplug at 12mm. You can buy the plug with the proper reach.

10-21-2008, 08:01 AM	#10 (permalink)
slickz50r 2nd Gear Member Join Date: Jun 2006 Location: San Antonio,Tx. Posts: 427 My Mood:	Re: So I rebuilt the carb, replaced and gapped the points Most any machine shop will have the thread insert you need.

10-21-2008, 01:51 PM	#12 (permalink)
Lair 2nd Gear Member Join Date: Nov 2007 Location: Birmingham, AL (Not a native.) Posts: 406	Re: So I rebuilt the carb, replaced and gapped the points OUCH. Ordered a 10mm metric kit from Time-sert. It was only $100 shipped.

10-21-2008, 03:30 PM	#13 (permalink)
FastMC Sporting the Merkin Join Date: Mar 2004 Location: boston area Posts: 5,275 My Mood:	Re: So I rebuilt the carb, replaced and gapped the points Now you can repair all your friends heads too ! Be sure and do it with both valves closed and the piston part way down the cylinder. Use lots of grease on the tap to minimize chips going in the cylinder.

10-21-2008, 06:37 PM	#14 (permalink)
Lair 2nd Gear Member Join Date: Nov 2007 Location: Birmingham, AL (Not a native.) Posts: 406	Re: So I rebuilt the carb, replaced and gapped the points I was planning to run a vacuum next to the plug hole while tapping, but the grease idea is sheer genius.

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