| Author | Message | ||
     Stormfool |
The other day oil spewed from the vent hose off the primary (located beneath the battery tray and routed up into the tailpiece to no where). Probably no more than an ounce or two over a three hundred mile highway run at 80-100 mph. Is this okay? It never happened before no matter how fast I ran the bike. The top end is freshly rebuilt and I just switched to synthetic oil (Royal Purple). Is this a sign of something bad going on inside the engine? | ||
| Mikej |
Check your fluid level. Could just be a bubble, or could be a blown seal allowing engine oil into the primary/trans side. Pop the clutch inspection cover and check your fluid level. If you "just switched" you might possibly have overfilled it a bit. Seems to be the two main things, overfilling or a seal. | ||
| Stormfool |
Thanks will do | ||
| Firemanjim |
2 common causes of spewing,first one most common,is overfilling trans.I forget what manual calls for,but its too much.Fluid should only come to bottom of clutch when filling,standing straight up--less than a quart,if I remember correctly.Next, there have been some seal failures of crank seal letting engine oil under pressure into trans, forcing out trans fluid.Usually higher mileage bikes,but I seem to remember they had a seal problem and went to an updated style.Check to see if you are loosing engine oil all of a sudden,and check trans fluid level.And a catch can is not a bad idea. | ||
| Court |
BUELL MAKES ANOTHER GEARHEAD ! And to think I knew you when you were JUST a Fireman......  | ||
| Crusty |
If your Trans oil is black, then you've got engine oil leaking past the seal. If it's its usual color (I assume purple), then you overfilled the primary. Changing the seal is an easy fix. | ||
| Firemanjim |
Court,I have never been JUST a fireman---- And mechanical aptitude was forced on me by economics. | ||
| Court |
>>>>Court,I have never been JUST a fireman---- Ahhh....my friend, 'tis not your aptitude, but your amplitude that endears you to all! Looking forward to talking to you soon. You've put in for vacation in September right? Don't make me have to hurt you. Court | ||
| Blake |
Storm, If you allow water to infiltrate the primary, possibly via pressure washing or even a garden hose spraying on the clutch cable adjuster boot, especially if the boot has slipped down exposing the adjuster assembly, it can reach boiling temperature and cause great havoc. Most likely though, you overfilled or have a crankshaft seal failure as already advised here. Let us know what you find. Here's hoping it's not the seal. | ||
| Firemanjim |
You tryin to say I'm LOUD--and vacation was done deal about 3 months ago.Getting ready to tear into bike this month.Been wrenching on the Derbi and furiously searching for someone--anyone willing to sell parts.Amazing lack of response to my deluge of e-mails sent out,up to and including Derbi in Spain.Damn!!!How hard could it be to find o/s pistons. | ||
| Stormfool |
Oil was black last two tranny fluid changes. Is that for certain a sign to change the seal? Is this something I can do without specialized tools? Any advice would be appreciated... | ||
| Mikej |
You just switched to the purple stuff, so if the prevous lube/oil was non-purple then the fact that the prevous drained fluid was black is not really a factor. What is a factor is how much fluid was in the primary just prior to draining it? And what color is the fluid now? The current color of your purple stuff may not be an indication because some residual non-purple stuff was probably still in the tranny and primary area that did not drain all the way out on your last change. Open up the side cover and check the current level before you do anything else, and before you start to go ordering parts. Once you report back on the current fluid level in the bike then people can give you better feedback.  | ||
| Court |
>>>How hard could it be to find o/s pistons. I spent a year searching for a set of 0.0010" over pistons for my XR-1000. I stopped in every H-D dealer I passed. Eventually, in OKC, the guy comes from the back room and, ala Staples...."yeah, we got that. Been here for years". Loud?. . . never met a guy on an Orange Buell I didn't love. Let me know if your luck doesn't turn and we'll delegate your Derbi problem to folks who have some inside track. Court | ||
| Firemanjim |
Court,delegate all you want,I just got e-mail from west coast dist saying no can do.Let me know what info you need.Serial # VTHGPRRBBYH135162. Engine #YH135251,BORE IS 47MM.Piston (stocker) is a 2 ring Mahle. | ||
| Ray_Maines |
Storm: Your question was "Is Spew from the Primary Common?" In a word, yes. When you drain your primary case, about 4oz's stays in the engine. So even though the book says the capacity is one quart, you should only put 28oz's back in when you replace the fluid. Whatever you add over 28oz's will "spew" back out the hoses. Think of it as a high tech, self leveling oil system and it becomes easier to live with. Them Jap. bikes got nothin' on us. | ||
| Aesquire |
"Them Jap. bikes got nothin' on us. " I dunno, my '77 Yamaha 750 triple had self leaking vacum petcocks. I discovered this when the crankcase filled with fuel. Bike started a little hard one day, rode 90 feet & bike puked about a gallon of oily 94 octane on my legs, pipes, street etc. There is no OFF position on the petcock! The gasket dried out over the winter, and Bluagh! 3 oil changes in 2 days, a new gasket set & off I go. 2 weeks later the 18 year old NOS gasket goes, same deal 90 feet & bleacghh!!! When I picked up my M2 I asked dealer if it had self leaking petcock, he was shocked. Then showed me how to work "A Harley petcock" cool, an off position! | ||
| Stormfool |
Thanks for all the sound advice. Should be into the case tomorrow.... | ||
| Pammy |
FJ, you can probably have the pistons made for you. You may have to get spares or find some other folks who are needing the same. There are folks here who have connections... | ||
| Firemanjim |
Pammy,cool,so what does a piston the size of a silver dollar cost?(So why is it I always pick out bikes with no parts available?I had the same problem with a certain S-2 in 1995.You have a what,sir??And you want parts for that??) |
