Over my head (and its OK!)

Started by mark68502, Apr 02 2012 11:37 PM

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18 replies to this topic

#11 Chuckster

World Superbike Racer

Forum Contributor
485 posts

Why VFRD?:NACA ducts and gear-driven cams
Location:Marietta, Georgia
In My Garage::1995 Honda VFR750
2003 Kawasaki Vulcan Classic 1600

Posted 03 April 2012 - 07:59 AM

Will not any vfr 750 engine 86-97 slip straight in? At least any RC24 engine anyway..86-90
Buy them cheap with carbs on.... saves a fortune and time.

That's what I'd be doing. :fing02:

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#12 mark68502

Local Racer

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11 posts

Why VFRD?:Bought project bike and am slowly learning...
Location:Lincoln, NE
In My Garage::1981 CB750K, 1987VFR700

Posted 03 April 2012 - 04:37 PM

Finally got the rear head completely off. Let me just say that engineering a bike so that 5 million parts have to come off BEFORE I can get to the exhaust bolts is just unkind.

Found that cylinder 1 was packed with a gross brown oily sludge! ALOT of gross, brown, oily sludge.

Note that my macbook is flipping images left to right so you are seeing a mirror version (left is right, right is left etc.)

Posted Image

Edited by mark68502, 03 April 2012 - 04:38 PM.

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#13 kgsmotorcycles

World Superbike Racer

Forum Contributor
523 posts

Why VFRD?:V.F.R.D. is simply the only place to be!
Location:Isle of Man
In My Garage::vfr750

Posted 03 April 2012 - 04:46 PM

eww
hardly fit for an ashtray...

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#14 kaldek

Impatient bugger

Forum Contributor
2778 posts

Why VFRD?:Even though I sold my VFR and am now a BMW owner, I love this forum like a family.
Location:Melbourne, Australia
In My Garage::2012 BMW K1300R

Posted 03 April 2012 - 06:40 PM

Isn't that what happens to coolant when it sits? Although I suppose it could have been an entire tank of gas drained into the cylinder and left to...ferment.

Anyway looks fixable to me! Make sure piston rings are OK, hone the bores, regrind the valve seats. Anyone else think so?

BMW K1300R is my new girlfriend.

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#15 kgsmotorcycles

World Superbike Racer

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523 posts

Why VFRD?:V.F.R.D. is simply the only place to be!
Location:Isle of Man
In My Garage::vfr750

Posted 03 April 2012 - 07:06 PM

bore it out and fit fireblade pistons?

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#16 mark68502

Local Racer

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Why VFRD?:Bought project bike and am slowly learning...
Location:Lincoln, NE
In My Garage::1981 CB750K, 1987VFR700

Posted 03 April 2012 - 08:45 PM

bore it out and fit fireblade pistons?

Why go fireblade when you could just throw in a flux capacitor?! :)

I threw it back together and it rolls through the compression cycle smoothly - no more sticking on cyl1! So the crud was just that, CRUD. Nary a corrosion spot to be seen in the cylinders. Before I could really look at the valves, had to go deal with one of my boys trying to mow down the other...literally! You never know what to expect out of a 5 year old...

Anyway looks fixable to me! Make sure piston rings are OK, hone the bores, regrind the valve seats. Anyone else think so?

So let me ask this, my goal for this year is to get it "running." Is the honing, ring check and relapping a fundamental part of that, or are those actions more related to performance?

I don't want to cut corners where safety is concerned and I don't want to shorten the life of the bike, but I plan on completing the "functional" phase before I start into performance enhancements. Once I figure out how the bike works and bring it back to life, I would enjoy going through it a second time (next year) with a less strictly functional goal in mind.

Edited by mark68502, 03 April 2012 - 08:46 PM.

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#17 mark68502

Local Racer

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Why VFRD?:Bought project bike and am slowly learning...
Location:Lincoln, NE
In My Garage::1981 CB750K, 1987VFR700

Posted 05 April 2012 - 05:11 PM

So let me ask this, my goal for this year is to get it "running." Is the honing, ring check and relapping a fundamental part of that, or are those actions more related to performance?

I don't want to cut corners where safety is concerned and I don't want to shorten the life of the bike, but I plan on completing the "functional" phase before I start into performance enhancements. Once I figure out how the bike works and bring it back to life, I would enjoy going through it a second time (next year) with a less strictly functional goal in mind.

No thoughts on this? Maybe its a dumb question with an obvious answer but us noobs have to start somewhere...

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#18 YoshiHNS

Race Team Owner

Forum Contributor
3874 posts

Why VFRD?:Because I want to make fun of Seb being a post ho
Location:Cleveland, OH
In My Garage::Honda dealership with some unwanted suzuki's

Posted 05 April 2012 - 09:16 PM

So let me ask this, my goal for this year is to get it "running." Is the honing, ring check and relapping a fundamental part of that, or are those actions more related to performance?

I don't want to cut corners where safety is concerned and I don't want to shorten the life of the bike, but I plan on completing the "functional" phase before I start into performance enhancements. Once I figure out how the bike works and bring it back to life, I would enjoy going through it a second time (next year) with a less strictly functional goal in mind.

No thoughts on this? Maybe its a dumb question with an obvious answer but us noobs have to start somewhere...

You have a very questionable engine. I would check those things over. Spin the crank by hand and check the bore. If you see any sort of scratches or marks, you are going to need to do major work on the block.

Not sure if the VFR cylinder walls have hash marks for oil like some car engines though.

Some bikes end up being a project. Yoshi manages to make it a career.

No no no. This is the precision toolboard. The hammer resides elsewhere.

Never ending projects: 1971 Suzuki MT50, 1989 Honda VTR250, 1994 Tomos Targa LX, 2000 Suzuki GSX600, 1996 VFR750F, 1985 Honda VF500C, 2006 Honda ST1300