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semo549

01 yz426 oil bolt stripped

13 posts in this topic

My buddy happened to strip out the oil drain plug. You can now pull the plug in and out of the cases. We are going riding in two days so I need a quick fix. I figure I'll re-tap the hole to a bigger size, Making sure to grease the tap to keep the shavings minimal. My question is; What size should I re-tap the hole to? What bolt dimensions should I get? I'm not sure what the factory bolt size is so can anyone help? I know down the road we will put a timesert or something that will last longer but we need this quick fix for the weekend. Help would be greatly appreciated.

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use crisco best lube. alot of drain plugs are the 14mm spark plug thread, you will need to mesure the old one the best you can, here is a conversion site

http://mg-jewelry.com/mmtoinches.html spark plug taps can be bought at napa store and they may have new plugs for it. or you could take to a shop and have a helicoil put in.

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Where did that info come from? The drain plug in the crankcase of the YZ426 and most other Japanese bikes is M10x1.5, not 14mm spark plug.

The best repair you can make quickly is Time-Sert or a Heli-Coil (Time-Sert very much preferable). Neither will take longer than trying to shortcut the job by using an oversized bolt.

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Where did that info come from? The drain plug in the crankcase of the YZ426 and most other Japanese bikes is M10x1.5, not 14mm spark plug.

The best repair you can make quickly is Time-Sert or a Heli-Coil (Time-Sert very much preferable). Neither will take longer than trying to shortcut the job by using an oversized bolt.

SUITABLE FOR : ( Honda man ya know )

CB400 A 1978, CB400 T 1978-1981, CM400 A 1979-1981, CM400 E 1980-1981, CM400 T 1979-1981, CB450 SC 1982-1983 & 1985-1986, CM450 A/E 1982-1983, CM450 C 1982, VT500 C 1983-1986, VT500 FT 1983-1984, VT600 C 1988-1998, CX650 C 1983-1984, CB750 A 1976-1978, CB750 C 1980-1982, CB750 K 1979-1982, CB750 L 1979, CB750 SC 1982-1983, VT750 C 1984-1986-1988-1998, PC800 1989-1990, VT800 C 1988, CB900 C 1980-1982, CBR1000 F 1987-1988-1993-1996, GL1000 1980-1983, CB1100 F 1983, VT1100 C 1985-1998, GL1200 1984-1987 Valkyrie, Gold Wing,2008 CB1300

and maybe other models with 14mm-1.5 oil plug just to name a few

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SUITABLE FOR : ( Honda man ya know )

CB400 A 1978, CB400 T 1978-1981, CM400 A 1979-1981, CM400 E 1980-1981, CM400 T 1979-1981, CB450 SC 1982-1983 & 1985-1986, CM450 A/E 1982-1983, CM450 C 1982, VT500 C 1983-1986, VT500 FT 1983-1984, VT600 C 1988-1998, CX650 C 1983-1984, CB750 A 1976-1978, CB750 C 1980-1982, CB750 K 1979-1982, CB750 L 1979, CB750 SC 1982-1983, VT750 C 1984-1986-1988-1998, PC800 1989-1990, VT800 C 1988, CB900 C 1980-1982, CBR1000 F 1987-1988-1993-1996, GL1000 1980-1983, CB1100 F 1983, VT1100 C 1985-1998, GL1200 1984-1987 Valkyrie, Gold Wing,2008 CB1300

and maybe other models with 14mm-1.5 oil plug just to name a few

Honda road bikes, every one. Nevertheless, that information has no application to the question at hand.

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Just to add to what gray has said.. the timesert is the best one to use, but the hole will have to be drilled and tapped to fit the insert (timesert). That way you can use a factory oil plug.. it will take a good machinist about 15 minutes, and an average guy maybe a little longer. Not a hard repair but you want it done right.

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Can I just Tap the Hole to a 12mm, then put a bolt (m12 x 1.5) with a copper washer on it?

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Can I just Tap the Hole to a 12mm, then put a bolt (m12 x 1.5) with a copper washer on it?
It's your bike. I wouldn't do that.

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i definatley would not recomend that.. it may work for a little while but it may fail.. and if it fails no bueno... your oil could leak out and then your hosed.. you are better off fixing it right then not having to worry about it.

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The helicoil will be the same size.. 10x1.5 inner diameter.. look at that video that yamaha6j posted.. it is the same principle for a helicoil minus the back cut (the inlay cut that makes it flush), you will not need to do that with a helicoil, just drill, tap, place the helicoil, and put new drain plug in.. I would still recommend the insert as there is less of a chance of pieces breaking off and getting into your oil. A helicoil is a strand of steel that resembles a spring, the insert is solid.

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Sounds good. What size Helicoil should I purchase?
The drain plug in the crankcase of the YZ426 ... is M10x1.5,

That size.

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