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Old 01-17-2013, 07:42 PM   #72946
Emmbeedee
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Originally Posted by Trbig67 View Post
FInally found it. Thank you.
I bought two of the first batch Procycle made up.

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Old 01-17-2013, 07:46 PM   #72947
TinkerinWstuff
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Originally Posted by ER70S-2 View Post
The question has been asked: "How heavy is the DR engine?" You could tell us here AND post it up in Krusty's DR Index (Hiya Krusty, thanks again for the DR650SE INDEX ). Or you could let us down and be forgotten forever.

Here: Topic 12:
http://www.advrider.com/forums/showp...2&postcount=32

I will see what I can do!

I just know it should be 1ounce lighter now than it was before
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Old 01-17-2013, 09:03 PM   #72948
ER70S-2
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I will see what I can do!
Tank ewe.

Quote:
Originally Posted by TinkerinWstuff;20513407I
just know it should be 1ounce lighter now than it was before
I'm sure you're correct. Removing all that alum from the piston for valve clearance must be good for a multiple of pounds.
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Old 01-17-2013, 10:18 PM   #72949
Thumper Dan
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Originally Posted by TinkerinWstuff View Post
I will see what I can do!

I just know it should be 1ounce lighter now than it was before
noob question, why do you have to remove the motor to put the new high comp piston in? Can't it be done whilst motor is in the bike?? I'm sure there is another reason.

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Old 01-18-2013, 06:45 AM   #72950
TinkerinWstuff
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Originally Posted by Thumper Dan View Post
noob question, why do you have to remove the motor to put the new high comp piston in? Can't it be done whilst motor is in the bike?? I'm sure there is another reason.

I'm not sure if it can be. Seems like there's a real possibility. Someone will undoubtedly chime in that knows for sure.

But by the time you have it far enough apart to attempt to remove the jug in the frame, it's three more motor mount bolts and a couple other misc garbage to have it on the ground. Literally less than 10 more minutes to have it on the bench.

Too bad my bench is over flowing with other garbage and there was no room for the motor.
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Old 01-18-2013, 07:10 AM   #72951
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Originally Posted by ER70S-2 View Post
The question has been asked: "How heavy is the DR engine?"
Just a tad over 100 pounds.
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DR900 Big Bore Stroker buildup
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Old 01-18-2013, 07:15 AM   #72952
procycle
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Originally Posted by Thumper Dan View Post
noob question, why do you have to remove the motor to put the new high comp piston in?
Yes, the top end can be serviced in the frame. It's not much more work to remove the whole thing but leaving the bottom end in the frame gives you a built in 'engine stand' to hold it firmly when installing the cylinder, rotating the crankshaft, torquing the head bolts, etc.
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www.procycle.us - Everything for your DR650 and lots of other great stuff!
DR900 Big Bore Stroker buildup
TurboDiesel Corvette - go to the end to start at the beginning
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Old 01-18-2013, 08:03 AM   #72953
RichBeBe
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Originally Posted by procycle View Post
Yes, the top end can be serviced in the frame. It's not much more work to remove the whole thing but leaving the bottom end in the frame gives you a built in 'engine stand' to hold it firmly when installing the cylinder, rotating the crankshaft, torquing the head bolts, etc.
Funny I am going to be doing some work on mine and that was my thought. I like the engine stand aspect of the frame. I need to do valve seals (maybe guides, but hope not) and rings. But just going to go with a hi-comp piston, may also pull a favor and throw in a cam.
I have an FCR and open airbox, but a stock pipe which i want to stay with and not sure how the cam will work with it, and if it is worth it. I want to look at the stock grind versus the 223 grind and make some decisions. I am most interested if the lobe centers change at all.
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Old 01-18-2013, 09:13 AM   #72954
ER70S-2
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Just a tad over 100 pounds.
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"BTW, I don't do style. It's a dirt bike, not some girlie dress-up thing." -
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Old 01-18-2013, 09:17 AM   #72955
opium89
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Originally Posted by Thumper Dan View Post
noob question, why do you have to remove the motor to put the new high comp piston in? Can't it be done whilst motor is in the bike?? I'm sure there is another reason.

I just did this, and yes it can easily be done by removing the top end with the engine still in the bike. I will also tell you that it is MUCH easier to remove the bottom end with the top end already disassembled. It was a serious PITA to get it in and out completely assembled and I wont be doing it that way again.
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Old 01-18-2013, 09:39 AM   #72956
TinkerinWstuff
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maybe it's a perspective thing. Wrestle with a Honda V4 by yourself and the DR is a flippin cupcake.
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Old 01-18-2013, 09:46 AM   #72957
procycle
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Originally Posted by TinkerinWstuff View Post
maybe it's a perspective thing. Wrestle with a Honda V4 by yourself and the DR is a flippin cupcake.
Been there, done that!
Long ago I learned to dislike servicing V4s. So many things have to be done twice. It's like working on 2 motors at once...
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DR900 Big Bore Stroker buildup
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Old 01-18-2013, 10:01 AM   #72958
deathu
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Quote:
Originally Posted by procycle View Post
And you can be sure there is matching galling in the small end of the rod. Any repair that does not include replacing the connecting rod is going to have limited life/reliability.
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Originally Posted by Mongle View Post
I completely understand. I say if the rod looks good: get a new pin and just have the piston honed. Obviously it was running when you took it apart so it is not like it is so screwed up it will never run again.
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Originally Posted by deathu View Post
I for sure will check how the small end looks, as soon as I have a chance.
So here is how my conrod small end looks like:






Obviously it is far from perfect, but how bad do you guys think it actually is?
As a side note, I was checking the ebay for complete crankshafts (second hand) and I found this one. Just look at the last picture of that item... seems just as bad as mine, if not worse. What struck me is that the seller states "good condition".


I'd really appreciate some input on this... How bad is the situation? what should I expect from this engine? Maybe at some point in the future I will manage to replace the conrod, but I need to know on the short term, do I need to worry? The bike will see maybe 5000kms/year, with a stock piston, and I don't run it hard.
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Old 01-18-2013, 10:28 AM   #72959
TinkerinWstuff
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Quote:
Originally Posted by ER70S-2 View Post
The question has been asked: "How heavy is the DR engine?" You could tell us here AND post it up in Krusty's DR Index (Hiya Krusty, thanks again for the DR650SE INDEX ). Or you could let us down and be forgotten forever.

Here: Topic 12:
http://www.advrider.com/forums/showp...2&postcount=32
Bathroom scale said 107.5lbs (with oil)

Quote:
Originally Posted by procycle View Post
Just a tad over 100 pounds.
thunder stealer
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Old 01-18-2013, 10:45 AM   #72960
procycle
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Originally Posted by deathu View Post
So here is how my conrod small end looks like:

Obviously it is far from perfect, but how bad do you guys think it actually is?
As a side note, I was checking the ebay for complete crankshafts (second hand) and I found this one. Just look at the last picture of that item... seems just as bad as mine, if not worse. What struck me is that the seller states "good condition".
Yeah, the eBay item is worse. Obviously the seller does not know much but at leas there's a good photo of the small end to keep you from wasting any money on it.

How bad is yours? Well it's not at the point that it would self destruct immediately but it's a long way from being long term reliable. Running that rod will be a gamble on your part. It might last one year it might last ten years. It might make a rattling top end noise for the rest of the life of motor - or not. All the power the motor makes is transmitted through that little area between the rod and the pin. If this came into my shop (back when I was in the repair business) I would not put it back together with that kind of damage. Not because I wanted to sell the customer a new crankshaft but because as a professional you have to stand behind your work. You can't stand behind a motor put together with marginal parts.

Doing your own work and making your own decisions you can take that gamble if you want to. If or when there is a problem down the road you won't have some else to blame.
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www.procycle.us - Everything for your DR650 and lots of other great stuff!
DR900 Big Bore Stroker buildup
TurboDiesel Corvette - go to the end to start at the beginning
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