| Author | Message | ||
     Bad_karma |
Heading out for the WV Buell Rally took off Thursday for Hinton, WV. Friday morning started out on one cylinder. Instead of heading up 16 turn toward Lewisburg to get a rental truck. Didn't make it before the engine quit. Front cylinder very lean,melted piston, head to piston contact, bent intake valve, and bent intake valve push rod. Continue to disassemble this week. Joe    | ||
| Firebolt020283 |
ouch that is just nasty sorry about the bad luck there and hope you get it fixed. | ||
| Chasespeed |
DAMN Wonder what the rear looks like.... What did the spark plug look like? That just sucks. Chase | ||
| Rick_a |
Damn, that's ugly. | ||
| Bad_karma |
Chase I had changed the plugs out about 900 miles earlier. The front showed the lean indications you would expect, white and metal splatter. But the carbon ring was only half way up the insulator. The back plug is covered in oil. I had just returned the main jet to the installed 175 from a 177.5. I had tried up to the 180 but the smell of raw fuel was excessive. With the 177.5 the complete insulator was black both front and rear. I had light valve tapping but not excessive. No intake seal leak. The needle is up two rings. The motors takes a long time to warm up. The reason I started fatting up the main jet. Joe  | ||
| Jmr1283 |
sorry to see ur bike down. hope things come to gather well. | ||
| Phelan |
I had that happen on my 1200S, but with the rear cylinder. Mine turned out to be because of a shattered drive gear on the oil pump. Could become quite a nasty tear-down... | ||
| Buellistic |
Bad_karma: The way "i" have my 1997 S3T tuned: Advanced timing, mark just coming into the timing plug hole ... 2 1/2 out on the idle screw, #48 low speed, M2 needle raised 0.050, PRODUCT IMPROVED slide, and a #200 high speed ... This gives me a 12 to 1 fuel/air mixture ... Get 44 MPG ... Ever check your intake manifold "0" rings which are good for two years and for 4 years if you have a cooling fan ... | ||
| Eshardball |
Ditto on the intake O rings. I had a similar catastrophy on a Sportster that turned out to be a vaccuum leak at the O ring. Did it do alot of popping and backfiring a couple days prior to the meltdown? | ||
| Bad_karma |
Thanks Josh, Eric no popping backfiring thru the intake, seals where good engine had something less than 7000 miles with the build completed last winter. Lafayette glad your engine tuning is working good, seems like a lot of advance. Had my engine guy look at it. He is leaning to wards ignition failure. The HSR45 has a 175 main, up one on the needle size and the stock pilot jet which I believe is a 25. Intake seals where good, timing was set at zero with a max advance of 32 degrees. I had actual seen 48 MPG with this motor.The red shift camshafts have fairly high lift .630 on the intake and .585 on the exhaust but narrow duration with 248 on the intake and 262 on exhaust. We will be able to reuse the sleeves with some machining and heads after a new intake valve and guide. So it's labor, a pair of pistons, gaskets and a replacement push rod. Then what is ever determined about the ignition. Joe (Message edited by bad_karma on August 27, 2008) (Message edited by bad_karma on August 27, 2008) | ||
| Oldog |
so the post mortum is that the ignition system caused the damage by incorrect timing / advance Man I hated to see that. | ||
| Bad_karma |
The ignition hasn't been tested yet, but more experienced people have looked at the engine and believe that is the case. I just want to know for sure so the rebuild has some endurance. I miss roving the Appalachian mountains during the summer. Too many roads left unsampled. Joe | ||
| Eshardball |
It would be great to verify that there was not more than one cause to such a severe meltdown. It seems like more than just too much advance to generate that much damage without first hearing all kinds of pinging | ||
| Torqd |
We had a built S2 that did the same thing... The piece in the nosecone kinda just melted... scuffed a set of pistons... bad deal all around. | ||
| Bad_karma |
Frank ever find the cause of failure? It draws but it's just metal and can be replaced. But the interrupted trip is another thing. Joe | ||
| Mick |
Sorry for ya mate, thats a mess, I know how I'd feel. | ||
| Torqd |
You know it happened right after we sold the bike... all I know is that everything looked fine but the nosecone unit where the wire is attached to the plate was melted... that was the only thing out of the ordinary. He rebuilt it and replaced the plate and all was well for as long as I kept in touch with him. It was a friends 95S2 we sold with 100hp or so. No pinging or anything... it just "happened". The motor had Hurricane Pistons, Nallin Thunderstorm heads, SE 536 cams, SE Lifters, SE ignition, Buell race pipe and Mikuni 42. Sorry I could not be more helpful. Frank | ||
| Bad_karma |
Thanks Mick, Frank kinda of leaning that way ignition that is, will get this sorted and on the road soon. Joe |
