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Post by moofus02 on Dec 23, 2015 8:55:34 GMT -5
The Yamaha uses a gear behind the stator to drive the pump. The clones use a throttle cable to adjust oil yamaha is just rpm dependant. The factory pump is stone reliable until you need a richer oil ratio like at the mid race cylinder level.
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Post by tsimi on Dec 24, 2015 0:05:06 GMT -5
They built these things to last thousands of miles by people that generally do no maintance and treat them like shit. We're a rare bread of enthusiast that actually maintain them. So true! I see many examples every day thinking "man what a waste of good scooters." |
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Post by tsimi on Dec 24, 2015 3:53:24 GMT -5
Today is Christmas for me.
First i finished work early, because of that i had time to clean the engines oil residue and remove the BBK. Then to my surprise the BBK looked absolute fantastic. (many pictures later...)
And while i was cleaning the engine outside in this nice sunny weather the postman came and brought my treats! Yes! Treatland carb stuff arrived! It could not have been a better timing for it. So i prepared the carb by putting a 40 pilot and a 100 main jet for now (...and removed that golden washer dish) and added the new 90 degree bendies.
What a fantastic day. Tomorrow one more day work then.... holiday! Now i just need the new needle bearings to arrive and i am ready to swap.
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Post by spaz12 on Dec 24, 2015 4:29:43 GMT -5
New parts are always nice! Sounds to me like you're gonna do a top notch job on that motor Tsimi.  |
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Post by tsimi on Dec 24, 2015 4:38:38 GMT -5
Thanks spaz12  So here the images. Here again the oil residue.  And another one close up. The oil line seems to be OK it could be that some of it came out through the exhaust port of the cylinder when I was adding way too much oil at the beginning.  The head looks not damaged. There is some weird, white residue on it. No idea what that is. Maybe the engine got too excited?  As you can see some black, burned coating on the head of the piston. My guess here too much oil. Cleaned it with carb cleaner and a bit of wet sanding.   The following images show the piston "before" cleaning, yes that piston has not been cleaned yet. Look, no scratches on either side. You can even feel the ripples when you go over the side with your finger nail. Inside also no burn coating, looks like new. Same goes for the piston rings all good there. Even the needle bearing looks very good. No sign of wear visually.     And last, my treats from the Kingdom. 3x 90 degree bends + pilot jets (38, 40)  |
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Post by 90GTVert on Dec 24, 2015 6:32:31 GMT -5
You've got some ash buildup, but looking at the overall condition of the piston, the oil was doing it's job well. Hopefully you'll get similar results without all the oil on the engine and deposits if you tone it down a little.
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Post by tsimi on Dec 24, 2015 8:02:21 GMT -5
You've got some ash buildup, but looking at the overall condition of the piston, the oil was doing it's job well. Hopefully you'll get similar results without all the oil on the engine and deposits if you tone it down a little. Thanks Brent. Yeah, I think I over-did it a bit at the beginning right after the BBK install. Towards the end of the break in period I stopped adding additional oil to the tank and it got a lot better. Well better a bit ash then a seized BBK. Now I know that the Yamaha oil pump does a very good Job even for a sport grade BBK. I am very curious to see how it goes once I swapped the BBK to the 5BM engine. That is why I am gonna wait with the carb installation because I wan't to compare the engine types first. What do you think about the needle bearing? Change it or keep the same one? Or maybe use it for the stock top end and use a new bearing for the BBK? |
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Jog-Mania
Dec 24, 2015 9:33:13 GMT -5
via mobile
Post by tsimi on Dec 24, 2015 9:33:13 GMT -5
Is there a secret as to how to install those goddamn G circlips? I tried to get one in for testing and i just can't put it in. The Polini circlips with the double G were lot easier.
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Post by niz76 on Dec 24, 2015 9:50:00 GMT -5
Those clips were made by the devil himself!  |
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Post by 90GTVert on Dec 24, 2015 11:23:23 GMT -5
Is there a secret as to how to install those goddamn G circlips? I tried to get one in for testing and i just can't put it in. The Polini circlips with the double G were lot easier. Get a good grip on the tang of the G using needle nosed or bent needle nosed pliers. I usually put them at an angle to start into the groove, open end first. You can put a little pressure on the clip to compress it and then push the other side in. Try not to use any more force than necessary. It's one of those things you will get the hang of sooner or later, but even then they can still be a pain at times. The best tip I have is to install one before the piston goes on the rod so it's a bit easier. Also, install so the open end faces either the head or the crank. |
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Jog-Mania
Dec 24, 2015 11:31:40 GMT -5
via mobile
Post by tsimi on Dec 24, 2015 11:31:40 GMT -5
90GTVertWhich part should go first into the groove? The part that you hold with the pliers or the other?
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Post by 90GTVert on Dec 24, 2015 11:58:26 GMT -5
The top of the G so you can apply pressure to compress the clip a little. Do it the other way and you'll just be trying the bend the circlip.
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Post by spaz12 on Dec 24, 2015 15:17:19 GMT -5
Hmm, sounds like video tutorial time. As if your schedule wasn't full enough Brent? |
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Post by tsimi on Dec 24, 2015 17:35:30 GMT -5
Top of the G? The side that you can't grab with the pliers? The straight part? A video tutorial would be awesome. I would consider it a christmas present from you. And after i manage to get it in do I have to cut off the part that you can hold with the pliers? Make a C from a G so to say. |
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Post by spaz12 on Dec 24, 2015 18:00:30 GMT -5
No, you don't want to cut anything. So hard to try to explain... Not so difficult once learned. Anyway, I'll hold the clip in my pliers in such a way as to make it easier to start the opposite end of the clip into its place. When it's in there I add enough pressure so that I can start to turn/twist the clip but the end stays in its original spot. With it staying in its original spot and twisting it, I'm making it smaller so that I can get it into that recess. I suck at essplainin' so I hope you get that |
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