Suprx125
New member
gil7247
VIP Member
Nice sled! I did my first total engine rebuild on my Viper last summer. With help and advice from these guys on this site, it was no big deal and now I know what I got. PS it was also kind of fun, now I know more how everything works.
J_hubbs
New member
Im sure there are guys on here that would trade you a rebuilt crank and a set of KYB fronts for your Ohlins. Just a thought.
Devilin AblueDress!
New member
The Ohlins are going for like $300 for fronts, got the ohlins out back? Definatley a helluva deal!
After thinking about this whole oil pump failure issue, I'm somewhat perplexed as to the lack of oil if the pumps are designed to fail wide open...
So - other possibilities could be:
1 - blocked vent line / clogged oil feed line
2 - oil pump drive gear?
3 - crank seal - (but would a crank seal cause a lean enough condition to resemble lack of oil?)
4 - mis-adjusted oil pump cable
5 - ???
Any other possibilities?
I haven't had a chance to tear into it yet due to work however I will this weekend.
So - other possibilities could be:
1 - blocked vent line / clogged oil feed line
2 - oil pump drive gear?
3 - crank seal - (but would a crank seal cause a lean enough condition to resemble lack of oil?)
4 - mis-adjusted oil pump cable
5 - ???
Any other possibilities?
I haven't had a chance to tear into it yet due to work however I will this weekend.
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post some pics when you tear it down, i do lots of these engines and i have had a few with bad pumps but never had a engine down due to lack of oil.
I wouldnt bet on this till you have it apart, it will be very evident if its a lack of oil as most everything will be blue,rods,crank throws,piston pins, bearings,etc.
I wouldnt bet on this till you have it apart, it will be very evident if its a lack of oil as most everything will be blue,rods,crank throws,piston pins, bearings,etc.
mrviper700 said:
Will do. It's driving me nuts not being able to tear it down until the weekend; the anticipation is mind-boggling
rx1jim
New member
I don't understand the statement I have seen numerous times that when the oil pump fails, it fails in a manner that delivers a maximum amount of oil. The oil pump is a gear pump with many parts that can fail. If any one of the majority of the parts fail such as one of the gears, it will result in no oil, not a maximum amount of oil.
Can someone clarify the statement that the pumps failure results in a maximum amount of oil being delivered??
Thanks,
Jim
Can someone clarify the statement that the pumps failure results in a maximum amount of oil being delivered??
Thanks,
Jim
rx1jim said:
Great question, Jim.
I would think that if the pump failed for whatever reason, it would do just that - fail at delivering any oil whatsoever. So I'm with you on this question....
I can understand the premise of failing at wide-open delivery if such failure were to occur - but at the same time the opposite seems possible as well.
Does the pump, by design, limit oil into the crankcase or limit vacuum from the crankcase as a means of oil delivery? Again -
-Mark
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Alright so I was going to start tearing into the engine tonight, however I feel like absolute crap, so it will have to wait until tomorrow.
I did however find this tiny little spring lying on the belly pan in front of the lower case; see photos below. It's about 1/4" long. Does anyone know where this could have come from? Any chance it had anything to do with the engine malfunction?
Thanks,
-Mark
I did however find this tiny little spring lying on the belly pan in front of the lower case; see photos below. It's about 1/4" long. Does anyone know where this could have come from? Any chance it had anything to do with the engine malfunction?
Thanks,
-Mark
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bluewho
Active member
My quess is a power valve spring it looks to big for a choke spring
.
.
staggs65
Moderator
he says 1/4 inch long though. so too small for PV spring. do the S models have reverse? there's a small spring in the chaincase on reverse models. just a thought. nothing else is coming to mind that small.
staggs65 said:
Mine has reverse. However I don't see this spring being a component of a chain case - you can literally compress it with only a few ounces of pressure. Think of a retractable pen spring.
Can't imagine what it could be from - definitely too small to be a choke plunger spring. I do appreciate the thoughts though.
I can't wait to get into this thing tomorrow! I've decided that I'm going to do a full rebuild regardless.
Snow will be here soon!!!
-Mark
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staggs65
Moderator
yep, thats what im talking about. http://www.totallyamaha.net/forums/showthread.php?t=82902&highlight=reverse+springRevAgent said:Mine has reverse. However I don't see this spring being a component of a chain case - you can literally compress it with only a few ounces of pressure. Think of a retractable pen spring.
Can't imagine what it could be from - definitely too small to be a choke plunger spring. I do appreciate the thoughts though.
I can't wait to get into this thing tomorrow! I've decided that I'm going to do a full rebuild regardless.
Snow will be here soon!!!
-Mark
staggs65 said:
What the hell?
How on earth does that survive in a chain case? And here's a better question - how the hell did it make its way out?
staggs65
Moderator
my guess would be someone dropped it at some point taking the chaincase apart and either A: couldnt find it. or B: didnt notice it fell out.
Mind-boggling. I can't believe that it actually serves a function. Looks like I'll add tearing into the chain case to the list...
staggs65
Moderator
you probably should anyways to inspect at the least
staggs65 said:
Agreed.
Looking at the micro-fiche below, the spring I have looks much smaller, especially shorter, than the #41 spring....hmmmmmmmmmmmm. I'll just have to wait and see. It's really the last of my concerns right now.
