TW200 Forum banner

Not open for further replies.
1 - 1 of 1 Posts

7,051 Posts
Discussion Starter #1
I replaced some o-rings on my new to me second TW because of seepage. Here are the part numbers and how they fit (IMHO).

Cam sprocket cover o-ring: 2-155 N-70

O-ring is a little short but will stretch to fit and should work well. .36 cents each.

Drain plug o-ring : 2-221 N-70

Excellent fit. 19 cents each.

Large oil filter cover o-ring: 2-227 N-70

O-ring is just a teeny tiny bit to big but can be used. It should work well. 21 cents each.

Small oil filter cover o-ring: 2-108 N-70

Replacement is a teeny tiny bit to small but should work well. 6 cents each.

Valve cover o-ring: 2-140 N-70

Excellent fit. 21 cents each. Remember to order at least two of them.

Small blind plug o-ring: 2-113 N-70

Excellent fit. 18 cents each.

Big blind plug o-ring: 2-124 N-70

Excellent fit. 30 cents each.

Plastic cam chain adjusting cover: 2-115 N-70

O-ring is a little large but can be pushed into the groove and stays there. 18 cents each

Plastic oil fill plug: 2-116 N-70

O-ring is a little small but stays on plug when unscrewed. 2-117 is larger but will fall off. 18 cents each.

Starter housing o-ring that seal starter to engine case: 2-120

Excellent fit ! Should last a very long time and only costs .11 cents each.

Carburetor float bowl gasket: 2-037

2.5" in diameter and 1/16" cross section. Seems to fit well enough but you have to use High Tack gasket sealer to hold the o-ring in place. $.70 each for Buna (Nitrile) and $2 each for Vitron (better in gasoline)*

*(1-9-'14) I think Ace Seal has wised up and is charging more to people that just buy a few o-rings at a time. Grainger is cheaper per o-ring but you have to buy in quantity.

I bought them at Ace Seal. They do mail order via email or phone. $15 minimum order for mail order -- no minimum if you walk in. I don't know about S&H.

I spoke with a guy that works there and he said if I wanted to upgrade o-ring material (higher temperatures) then to go with the Flourosilicone (L) or the Viton (V). The cost is 3 to 4 times greater than the Nitrile (N).

1 - 1 of 1 Posts
Not open for further replies.