| Author | Message | ||
     Andersonhdj |
So i'm a bit lost here, still fairly new to Buell tech. I need to get a gasket set for my 2004 XB9SX. I need either a full set or a top end set. Problem is, i'm not sure where i should be looking! I have seen a "Cometic" top end set at Dennis Kirk's but it's listed for a Firebolt, and the listing indicates it won't fit???? I was of the understanding the engines are the same! Could someone please point me in the right direction! | ||
| Rchuff |
it will fit your bike if it is the same year.firebolt or lighting same years same engines. | ||
| Andersonhdj |
Thanks! thats what i figured!! See , i can't afford to get it wrong because i'm in South Africa. There's sod-all support and a full cometic set cost's what amounts to a weeks wages for some guys!! | ||
| Rageonthedl |
Yeah I just got a full set from cometic for my 03. Its about $150us retail | ||
| Cataract2 |
Suggestion. Get some Hylomar to add with the gaskets. I used the Comtetic gasket set and it leaked after the install on the top end. Drove me nuts as I cleaned the surface and torqued the bolts to spec. In the end I got some Hylomar and added it with the gasket. No issue since. You can find Hylomar at Advance Auto. Just ask for it. | ||
| Andersonhdj |
Thanks for the suggestion! However i actually, I use a product similar to BMW's "Dreibond", i think Yamaha labelled it "Threebond". It's grey in colour and is not affected in any way by oil. I think it's exactly the same formulation at a fraction of the price of the Beemer product. I have found it to be the last word in sealants for motorcycle casings, especially the likes of the old CB750 K0 - 7 series that were prone to developing leaks around the output shaft area. The last time i used Blue Hylomar was in the 70's on BSA casings, still leaked oil like crazy! but that was in my youth so maybe i just did'nt do it right! | ||
| Livers |
Keep in mind there is a difference in application here, cases vs gaskets. The Hylomar is great for gasket use. I wouldn't use it for case sealer. | ||
| Andersonhdj |
Yeah, got that thanks! I have'nt used Hylomar since the 70's. Motorcycle Mechanics here, except for those in franchise of course, all seemed to think that RTV silicone sealants were the thing. Of course it depended largely on the size of your finger and an understanding of physics. The number of wrecked motors i have seen from excessive/stupid use of RTV's is mind boggling! I've used the "Threebond" in both applications when reqd but generally fit a gasket with a light coat of HT grease, don't usually have probs but when i have ,"threebond" has sorted it. (Message edited by andersonhdj on March 28, 2013) | ||
| Greg_e |
Hylomar is used on heavily ported RX-7 rotary engines where the port runs beyond the o-rings, the hylomar is the only thing that will keep the fluids where they should be. Worked great on my top end rebuild, though I might not use the universal (or Racing) blue formula for the case halves, there may be a better formula for that. | ||
| Livers |
Greg, the original Yamabond formula as I remember was specifically for case halves. Grey and mildly loose, slow setup. Used to buy it at K&H and it was excellent. A quick search shows a lot of products with that name so who knows but it looks like Yamabond 5 is the current product. | ||
| Greg_e |
It sounds like one of the other aviation types of cements. I know some people use one of the RTV compounds on case halves, not sure how well it works through, these are probably the guys that mark their spot when they park. | ||
| Fast1075 |
Toyota sells a product called FIPG. They use in place of gaskets for the oil pan and valve covers. It looks like ordinary black silicone sealer. Do not be deceived. If you have a gasket leak, clean the mating surfaces with brake cleaner to remove all traces of oil. Put a thin film of FIPG on the gasket and assemble it immediately. It is critical that the assembly be done before the sealant sets. There will be no more leak. Don't go crazy with it. A film is all you need for machines surfaces. Another sealant that has been around for many, many years is called Gasgacinch. Paint a gasket with it and let it dry before assembly. Especially useful for gaskets for covers and such that need service. It will in most cases allow the gasket to be reused, since the gasket usually will come off without damage. I also used gasgacinch on the case halves of the Kawi race engines with no problems or leaks, ever. On a case half, clean and dry, apply gasgacinch and assemble wet. | ||
| Greg_e |
Thanks for the additional products, something I'll have to try and remember. | ||
| Andersonhdj |
Some guys liked to use RTV and then clean up the outside of the casing when they were finished. Problem is the excess squeezed out inside the casing would degrade over time, become a jelly(o) like mass and get sucked into the oil pickup! No oil pressure, goodbye crankshaft! Absolutely detest the stuff, it has no place in a motorcycle engine! Fast1075, don't think we have those products here, possibly the Toyota brand but the other, i have never seen on the shelves. Btw, the memory is'nt so hot any more,the stuff i used in the 70's was "Red Hermetite" along with a cotton thread so seal case halves. Did'nt really work that well! Greg_e and Livers, it's the same stuff, also seem to remember an Aviation connection, possibly Rotax? | ||
| Fast1075 |
In an ideal situation, all new gaskets would come with sealant technology already applied, and everything would seal nicely. On the silicone issue, In my early years, I worked at a Honda shop. Only someone with experience could know how hard it was to keep the original CB-750 sealed up. The first use of silicone sealer I ever saw was to try to seal the "rubber bisquits" between the head and cam case. And I saw a lot of carnage from people who got wild with that old school silicone, but Permatex in a tube killed far more engines.. That is why I emphasized the minimal usage. Another draw back is it can cause base gaskets on engines with high stud torque to "squeeze" out. Normally, I dont use a base gasket. I lap the cylinder and use some sealant. The Gasgacinch may well be an odd product in places. I always ordered mine from Schnitz Racing when I ordered my consumables. It is as I said "old school" the label says "gasket sealer and belt dressing". It is an excellent product when properly applied. But the first objective is to fit up the bits properly so you need a minimum of sealant, if any. In fact I know an engine builder that laps case halves together on Kawi KZ motors, and uses no sealant at all (these are race engines that are taken down for refreshment constantly)and they do not leak oil. His thought is it is hard enough to keep the cases mated from the forces encountered, why lube them with sealant. |
