banshdog Posted August 30, 2004 Report Posted August 30, 2004 What causes pitting? I replaced my stock head with a Noss Head this weekend. Took off the stock one and noticed pitting on one side. What is this from? Planned on selling the stock head, is it worth anyhing if it is pitted? Quote
NYUK Posted August 30, 2004 Report Posted August 30, 2004 they are worth about 10 bucks un pitted. something went through the side with the pitting. Quote
frocashmoney24 Posted August 30, 2004 Report Posted August 30, 2004 the pitted head is basically worthless, good stockers go for like 15, pitting is either caused by something stuck between the piston and the head, or the piston is hitting the head, hows that piston look? can you take some pics Quote
banshdog Posted August 30, 2004 Author Report Posted August 30, 2004 The piston didnt look bad, the head did. cant take pics cuz i put the new head on already, but i can get pics of the head later today. I'll post it this evening or tommorow morning and you can tell me what you think. If something passed through, then i shouldnt worry about the new domes gettin messed up should i? will the new domes pit as bad as a stock head. Does pitting affect performance? (I assume it does, but how much?) So much for selling the stock head, paperweight anyone? Quote
frocashmoney24 Posted August 30, 2004 Report Posted August 30, 2004 you shouldent have to worry about your new domes getting messed up, whatever it was probably blew out the exhaust awhile ago and u just kept riding with a pitted head and didnt know about it, the new domes will pit just as easily as the stock head, it does affect performance, but i dont know how much, maybe someone else can shine a light on this Quote
banshdog Posted August 31, 2004 Author Report Posted August 31, 2004 Here is the stock head. I have another one but i thnkk this one is better. Not the best pic, i think you can see what im talkin about. Quote
boonman Posted August 31, 2004 Report Posted August 31, 2004 SOmething came apart in that motor at one time. It may still be apart. Be it a ring coming/breaking off, a skirt crackning off, or a bearing coming apart..... The pieces come up through the transfers, and get hammered up for a bit untill they make their way out the exhaust..... Quote
banshdog Posted August 31, 2004 Author Report Posted August 31, 2004 should i be worried? what is the proper way to check compression? Quote
KRMit Posted August 31, 2004 Report Posted August 31, 2004 should i be worried? what is the proper way to check compression? Go to an auto parts store and pick up a compression test kit. They run for around $30. I'm going today to get one from Harbor Freight for $20. Dunno if you have those around there. Quote
banshdog Posted August 31, 2004 Author Report Posted August 31, 2004 I know that i need a test kit, does the engin need to be warm/hot? how many times should the bike be kicked over? Quote
fixitrod Posted August 31, 2004 Report Posted August 31, 2004 I've been told cold by some and warm by some. I do mine cold. As far as the compression tester goes. I had one from harbor freight and it's way off. I bought one at advanced auto for $30 and it read the same as boonmans. He has a really really nice one. Mine may not last as long, but it's reading good for now. Quote
KRMit Posted September 1, 2004 Report Posted September 1, 2004 I've been told cold by some and warm by some. I do mine cold. As far as the compression tester goes. I had one from harbor freight and it's way off. I bought one at advanced auto for $30 and it read the same as boonmans. He has a really really nice one. Mine may not last as long, but it's reading good for now. I got one today for $15 from Harbor Freight. I just checked my compression (had to remove tank, is that normal?) today and it read 90psi on both cylinders. I did it cold, holding the throttle wide open and kicked it over about 20 times each. I did some slow kicks and some hard ones. I haven't had a rebuild in a couple years but 90psi seemed very low for such a powerful bike. So I guess I just need to find someone with a good gauge I can borrow right? Quote
KRMit Posted September 3, 2004 Report Posted September 3, 2004 A friend of mine has a tester he got from Sears and it read 120 on both cylinders. Get a good one! Quote
fixitrod Posted October 11, 2004 Report Posted October 11, 2004 I've been told cold by some and warm by some. I do mine cold. As far as the compression tester goes. I had one from harbor freight and it's way off. I bought one at advanced auto for $30 and it read the same as boonmans. He has a really really nice one. Mine may not last as long, but it's reading good for now. I got one today for $15 from Harbor Freight. I just checked my compression (had to remove tank, is that normal?) today and it read 90psi on both cylinders. I did it cold, holding the throttle wide open and kicked it over about 20 times each. I did some slow kicks and some hard ones. I haven't had a rebuild in a couple years but 90psi seemed very low for such a powerful bike. So I guess I just need to find someone with a good gauge I can borrow right? That's funny. I bought one from harbor frieght a long time ago and it read 90 on every motor I put it on. You have to buy a decent compression gauge. Quote
racer Posted October 11, 2004 Report Posted October 11, 2004 in responce to the thread title: yes, ill take some. Quote
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