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lonie |
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lonie Trackday Trickster
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MCN |
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MCN Super Spammer
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lonie |
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lonie Trackday Trickster
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Rogerborg |
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Rogerborg nimbA
Joined: 26 Oct 2010 Karma :
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Posted: 11:21 - 20 Feb 2018 Post subject: |
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MCN wrote: | Overspeeding a push rod engine can bend a push rod |
Where are the pushrods in an OHC engine, you fvcking piece of Tef? They do these "156/157FMI" lumps in both OHV and OHC variants.
Although you are going to have to fire in there and see what's what. I'd suggest checking for a vent valve, or a failed cam chain tensioner.
Or a bent pushrod if it's actually an OHV, but don't tell us the bike, that would take the fun out of it. ____________________ Biking is 1/20th as dangerous as horse riding.
GONE: HN125-8, LF-250B, GPz 305, GPZ 500S, Burgman 400 // RIDING: F650GS (800 twin), Royal Enfield Bullet Electra 500 AVL, Ninja 250R because racebike |
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lonie |
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lonie Trackday Trickster
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stinkwheel |
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stinkwheel Bovine Proctologist
Joined: 12 Jul 2004 Karma :
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Posted: 11:46 - 20 Feb 2018 Post subject: |
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I've seen tappet adjusters undo themselves too, if it has screw type adjusters.
I've also seen over-revved small CC bikes spin up their flywheel which would make the ignition timing out. ____________________ “Rule one: Always stick around for one more drink. That's when things happen. That's when you find out everything you want to know.”
I did the 2010 Round Britain Rally on my 350 Bullet. 89 landmarks, 3 months, 9,500 miles. |
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Polarbear |
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Polarbear Super Spammer
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lonie |
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lonie Trackday Trickster
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MCN |
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MCN Super Spammer
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weasley |
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weasley World Chat Champion
Joined: 16 Oct 2010 Karma :
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Posted: 13:55 - 20 Feb 2018 Post subject: |
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Rogerborg wrote: | They do these "156/157FMI" lumps in both OHV and OHC variants. |
You Teffing piece of fuck. OHV and OHC are not mutually exclusive. OHV is a description of an engine that is not side-valved (flathead). Pretty much any and every bike engine out there since forever has been OHV. Some have also been OHC, whilst others used an in-block cam and pushrods. Yes, people have been using OHV ≠ OHC for a long time, but people are often wrong - sadly if enough people say the wrong thing, it becomes de facto right (evidence: "the proof is in the pudding", "money is the root of all evil" and so on).
I'd be amazed if a bent valve in a 2-valve, single-cylinder engine would allow it to keep running up to 4-5,000 rpm. Pulling the valve cover off may reveal the answer, or may not. A compression check will tell you if the engine is huffing and puffing as it should. This procedure is essentially non-invasive, unlikely to introduce further issues and could rule out the need to pull the head off (which, being a OHC type, means a bit of faff). ____________________
Yamaha XJ600 | Yamaha YZF600R Thundercat | KTM 990 SMT | BMW F900XR TE |
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Rogerborg |
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Rogerborg nimbA
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WD Forte |
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WD Forte World Chat Champion
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bikenut |
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bikenut World Chat Champion
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lonie |
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lonie Trackday Trickster
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stinkwheel |
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stinkwheel Bovine Proctologist
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Old Thread Alert!
The last post was made 6 years, 33 days ago. Instead of replying here, would creating a new thread be more useful? |
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