A Motorcycle Thread About Absolutely Nothing!

[SilentRider]

Originally Posted by The Highlander

http://www.youtube.com/watch?v=41hkr...layer_embedded

ouch man! Gave me flashback of my bike accident! I wonder if the biker might have avoided the truck if he wasn't watching his friend fool around?

[purplecatty]

Originally Posted by Steinhauer

That sounds like a good idea, because I took apart my other GL1100 to find this:



I knew the bike had been dropped, but did not realize how much damage there was. That is a broken valve sitting in the cylinder which tore a hole right through the top of the piston.

I knew the crankcase had been cracked slightly from the drop - discovered it a day after the purchase as oil was all over my garage floor. I have a parts bike, sooooo ... I am going to tear down this motor and rebuild a good engine out of the two.



As I was dismantling it, I noticed the right side crankcase also had cracked motor mounts .... luckily for me the parts bike crankcases are dent and crack free.

Shoot, I know you wish you had two good engine instead of one. But the advantage is that you just trasnfer good parts to good engine anyway.

Yes, I can see that valve was damaged. Sound like Biker was careless on motorcycle which he dropped it.

Catty

[Steinhauer]

[purplecatty]

Originally Posted by Steinhauer

Hey!!! Oil spilling overr EEEKKK!!! J/K

Hope you had fun tearing it apart and rebuild it so that this Spring, you would be able to ride motorcycle!!

Catty

[purplecatty]

Originally Posted by Steinhauer

Hey!!! Lookie Oil spilling overr EEEKKK!!! J/K Wasn't that dirty oily rag huh?

Hope you had fun tearing it apart and rebuild it so that this Spring, you would be able to ride motorcycle!!

Catty

[purplecatty]

Right now, Jan 12th, It's now freezing out and just had first snow, It's just 1/4 inches that's it, cute. Temperature is 27 degree but 17 degree at night Brrrr. I refuse to ride motorcycle on that temperature like that.. Ice still on road regardless it's been dried up by salt. I going to put battery on float charge and put STP Fuel treatment in tank tomorrow until weather warms up. I am seeing next week temp are warming up to 50 degree. February will warms up even more. Very unusal weather this year cuz it was nice and warm all week last week or so and I was able to ride motorcycle.. Thanks to El Nina

Catty

[Steinhauer]

Got it - finally!




Selecting the best parts and putting humpty dumpty back together again.




Good piston replacing bad one - good crankcase replacing cracked one.




New gaskets and re-assembled




Hit temp ceramic engine enamel.

[Steinhauer]

I am currently working on rebuilding the headers. I am lapping the valves (making sure they seat properly) and replacing the valve seals.

This is how I kept from losing bolts - and solved the mystery of "hmm, where does this bolt go?"




I drew the bolt pattern on to a cardboard box, then stuck the bolts through the box.

[The Highlander]

Originally Posted by Steinhauer

I am currently working on rebuilding the headers. I am lapping the valves (making sure they seat properly) and replacing the valve seals.

This is how I kept from losing bolts - and solved the mystery of "hmm, where does this bolt go?"




I drew the bolt pattern on to a cardboard box, then stuck the bolts through the box.

Smart, I should do that.

[deafsmogtech]

Wow, good detail of the pics. Holed piston whoa.... My bet is there is exhaust valve dropped in your engine. The highest percent of the valve dropped in gasoline powered engines are Exhaust valves. But I didn't see the word of the exhaust valve in your post... Never mind, sorry to bother you and ADers in this thread.

[Steinhauer]

Originally Posted by deafsmogtech

Wow, good detail of the pics. Holed piston whoa.... My bet is there is exhaust valve dropped in your engine. The highest percent of the valve dropped in gasoline powered engines are Exhaust valves. But I didn't see the word of the exhaust valve in your post... Never mind, sorry to bother you and ADers in this thread.

No bother at all. You are correct, it was a dropped valve. The whole bike was dropped by the PO. When I was taking the crankcase apart, the mating bolts were cracked in half too. ( the dropped valve was the result of the engine being dropped on asphalt).

[The Highlander]

Originally Posted by Steinhauer

No bother at all. You are correct, it was a dropped valve. The whole bike was dropped by the PO. When I was taking the crankcase apart, the mating bolts were cracked in half too. ( the dropped valve was the result of the engine being dropped on asphalt).

Dropped valve due timing belt broke or spring broke?

[deafsmogtech]

Originally Posted by Steinhauer

No bother at all. You are correct, it was a dropped valve. The whole bike was dropped by the PO. When I was taking the crankcase apart, the mating bolts were cracked in half too. ( the dropped valve was the result of the engine being dropped on asphalt).

PO stands for postal office or what? Cracked mating bolts? I never see that before.
You says "The dropped valve was the result of the engine being dropped on ASPHALT". Sounds like joke to me. Is it real?

[Jiro]

Originally Posted by deafsmogtech

PO stands for postal office or what? Cracked mating bolts? I never see that before.
You says "The dropped valve was the result of the engine being dropped on ASPHALT". Sounds like joke to me. Is it real?

or Police Officer

[deafsmogtech]

Originally Posted by The Highlander

Dropped valve due timing belt broke or spring broke?

Broken valve spring (sometime), if you put wrong retainer keepers in the spring retainers that might cause the valves drop. Broken timing belt causes bend valves.

[The Highlander]

Originally Posted by deafsmogtech

Broken valve spring (sometime), if you put wrong retainer keepers in the spring retainers that might cause the valves drop. Broken timing belt causes bend valves.

True,

I seem valve spring broke at around 300k mileage from the diesel engine and timing chain still good. The valve melt on the piston. I wish I take a picture.

[Jiro]

I suppose this is how Steinhauer feels

shinya kimura @ chabott engineering on Vimeo

[deafsmogtech]

Originally Posted by Jiro

I suppose this is how Steinhauer feels

shinya kimura @ chabott engineering on Vimeo

No reply from Steinhauser...

Awesome vid, make me a pride cuz I am part of Japanese.... likes he is an Asian Jesse James....Love his custom made bikes... better than Paul Sr & Jr

[Steinhauer]

I have been away for a while and just saw this. That is an awesome video and thanks for sharing Jiro.

PO means Previous Owner or Prior Owner.

[Steinhauer]

Originally Posted by The Highlander

Dropped valve due timing belt broke or spring broke?

When the PO dropped the bike, it broke the timing belt pulley and tore up the timing belt. I am pretty sure that was when the valve kept striking the piston.

[The Highlander]

Originally Posted by deafsmogtech

No reply from Steinhauser...

Awesome vid, make me a pride cuz I am part of Japanese.... likes he is an Asian Jesse James....Love his custom made bikes... better than Paul Sr & Jr

I stop watch Paul Sr & Jr anymore. I can't stand to watch between of them over lawsuit and immature Michael.

[The Highlander]

Originally Posted by Steinhauer

When the PO dropped the bike, it broke the timing belt pulley and tore up the timing belt. I am pretty sure that was when the valve kept striking the piston.

Ah broke the timing belt pulley. I can image it. Thanks.

[deafsmogtech]

Originally Posted by Steinhauer

I have been away for a while and just saw this. That is an awesome video and thanks for sharing Jiro.

PO means Previous Owner or Prior Owner.

Got it

[deafsmogtech]

Originally Posted by Steinhauer

When the PO dropped the bike, it broke the timing belt pulley and tore up the timing belt. I am pretty sure that was when the valve kept striking the piston.

I now understand, oh poor PO. I agreed with Catty in post #1862, stated "Sound like Biker was careless on motorcycle which he dropped it"...

Do you know what broken exhaust head valve causes? Jiro? The Highlander? Everyone?

[Steinhauer]

I have had the engine back in for a couple of days now (picture taken a couple days ago):



There is something kind of minor I have to do before Crank it. The shift fork is not connecting with the transmission (I have to take the radiator out, drain all fluids - but I do not have to take the engine out ... whew!!!)

[Jiro]

Originally Posted by deafsmogtech

I now understand, oh poor PO. I agreed with Catty in post #1862, stated "Sound like Biker was careless on motorcycle which he dropped it"...

Do you know what broken exhaust head valve causes? Jiro? The Highlander? Everyone?

no idea. I've never done this kind of extensive mechanical work like taking engine apart and back.

[Steinhauer]

Originally Posted by Jiro

no idea. I've never done this kind of extensive mechanical work like taking engine apart and back.

The only way you will ever learn is by taking things apart. You can read all the manuals on how to do it - but you will never truly learn until you sit down and take one apart.

My next door neighbor (when I still lived with my dad years ago) was a retired Air Force pilot. He was a B-17 pilot in WWII and Korea. He had a wrecked plane in his backyard barn.

I wish I knew then what I know now - I would have been in his backyard barn putting it back together for him.

edit to add: Don't "learn" on an expensive bike - buy an older metric bike that someone has neglected and learn on that one first.

make him an offer

http://newjersey.craigslist.org/mcy/2797637841.html

[deafsmogtech]

Originally Posted by Jiro

no idea. I've never done this kind of extensive mechanical work like taking engine apart and back.

[The Highlander]

Originally Posted by deafsmogtech

I now understand, oh poor PO. I agreed with Catty in post #1862, stated "Sound like Biker was careless on motorcycle which he dropped it"...

Do you know what broken exhaust head valve causes? Jiro? The Highlander? Everyone?

Easy, overheat due bad A/F (raw fuel) or bad t-stat or other i forget.

[deafsmogtech]

Originally Posted by The Highlander

Easy, overheat due bad A/F (raw fuel) or bad t-stat or other i forget.

You are right and one wrong.... bad A/F (raw fuel) referring to richer Air/Fuel mixture, is NOT causing the overheat...

Simple, my answer is High Combustion Chamber Temperature.... the extreme heat gas flows past the exhaust valve seats then the stems and exits the ports (occur in exhaust strokes where the exhaust valves opens). They make the exhaust valves suffer, stress and fatigue over time, the head of the exhaust valve will break off from the stem and drop into the cylinder(s), just happen when the exhaust valves closed because the valve springs pull the stems to closing after complete exhaust stroke. The broken head drop in the cylinder, is more likely to be occurring in the intake stroke.