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Author Topic: Highest mileage on a SOHC?  (Read 31308 times)

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Offline mcpuffett

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Highest mileage on a SOHC?
« on: May 18, 2005, 09:34:31 am »
hi,just thought i would like to start a new thread, so who has the highest mileage sohc between us? i will start with mine 1976 750 f1 42,500 miles not many and i'm sure that theres plenty out there with a lot more miles on them just what can they do? ;) :-\   mick.
Honda cb750 F1 76' and cb750 KO 1970,   suzuki GT750A 1976  Honda VTX 1300 2006, Lancaster England.

Offline Harry

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Re: Highest mileage on a SOHC?
« Reply #1 on: May 18, 2005, 10:02:58 am »
Ha! I think the record for a bike is about 2.5 million km for a Gold Wing. But, who knows HOW far a Honda can go  :) A coupla thoughts on this subject:

"Buying an old bike means embarking on a rolling restoration. Each season you will improve your bike. You will amass a store of parts, probably an engine also. Around you, more and more parts will be produced as pattern parts. In around 5 years (10, 20?) your bike will be perfect (not over perfect, just perfect). In 50 years it will also be perfect. Your 8,000 mile bike will now be a 200,000 mile bike. You see, once a classic gets into the hands of an enthusiast, it doesn’t matter if its done 8,000 miles or 200,000 - the point is that part of the pleasure for us is maintaining and rejuvenating our machines. Expect to restore your bike maybe 4 or five times in your life, very basically when your young and poor, more detailed and originally when you’re older. Bikes aren’t human; they don’t wear down and die! Get out there and enjoy!"

My CB500F has only done around 60.000km - about halfway to its first rebuild  ;)  Hey, why not make this topic a POLL topic, so we can get a graphic distribution of mileages!?
« Last Edit: May 18, 2005, 10:05:01 am by Harry »
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Offline Harry

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Re: Highest mileage on a SOHC?
« Reply #2 on: May 18, 2005, 10:18:04 am »
mcpuffett started this post, which has been transferred to a Poll at his request. He wrote:

hi,just thought i would like to start a new thread, so who has the highest mileage sohc between us? i will start with mine 1976 750 f1 42,500 miles not many and i'm sure that theres plenty out there with a lot more miles on them just what can they do?     mick.
« Last Edit: May 18, 2005, 10:48:45 am by Harry »
Harry Teicher, member #3,  Denmark....no, NOT the capital of Sweden.

Offline Gordon

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Re: Highest mileage on a SOHC?
« Reply #3 on: May 18, 2005, 10:23:30 am »
We need more than one vote, for those with more than one bike. 

Offline Harry

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Re: Highest mileage on a SOHC?
« Reply #4 on: May 18, 2005, 10:24:31 am »
We need more than one vote, for those with more than one bike. 

Done!
Harry Teicher, member #3,  Denmark....no, NOT the capital of Sweden.

Offline mcpuffett

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Re: Highest mileage on a SOHC?
« Reply #5 on: May 18, 2005, 10:29:59 am »
thanks harry ;)  mick.
Honda cb750 F1 76' and cb750 KO 1970,   suzuki GT750A 1976  Honda VTX 1300 2006, Lancaster England.

Offline dusterdude

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Re: Highest mileage on a SOHC?
« Reply #6 on: May 18, 2005, 11:23:56 am »
harry,no its 25 thousand 5 hundred miles
« Last Edit: May 18, 2005, 01:40:23 pm by Harry »
mark
1972 k1 750
1949 fl panhead
1 1/2 gl1100 goldwings
1998 cbr600 f3

Spear

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Re: Highest mileage on a SOHC?
« Reply #7 on: May 18, 2005, 04:40:31 pm »
The odometer on my K2 says it has done just under 30,000 miles - the odometer that is. I don't know if that's the original speedo or not. No idea what the bike has done in its lifetime. What I do know however, is that the motor has only done about 3,500 miles since it was done up with the 812 kit. A bloke named 'Lucky' Kaiser did the bike up about 5 years ago for a former owner. Why lucky? Apparently this bloke is a bike nut and some years ago he put a jet motor in a bike frame, took it to the States and wrote it off on a speed run. Damned near killed himself, hence the tag 'Lucky'. Well that's the story I have from many and varied sources in the industry and I have no need to doubt them at all.
« Last Edit: August 25, 2007, 05:06:21 am by Glenn Stauffer »

Offline SteveD CB500F

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Re: Highest mileage on a SOHC?
« Reply #8 on: May 19, 2005, 01:10:36 am »
'72 500 with 9000 ( but no history before '83 so probably not accurate.)
'77 550 with 12500 (history from new)

The 500 in the avatar covered 51,000 before dying of terminal top end oil starvation.
The pic was taken on it's 50,000 birthday in Feb 1980.
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jdj845

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Re: Highest mileage on a SOHC?
« Reply #9 on: May 19, 2005, 03:03:38 pm »
34K on the cb750F1..Just under 10K on the cb400F

don_m

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Re: Highest mileage on a SOHC?
« Reply #10 on: May 19, 2005, 07:50:25 pm »
199,000+ miles & counting on my CB350F which I bought new in 1972.  The last 150,000 or more are after incleasing it to 427cc.  I recently rebuilt it to make it purty again.
Don (Psycle) Madden.

Offline diamondd

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Re: Highest mileage on a SOHC?
« Reply #11 on: May 21, 2005, 02:21:15 pm »
My 750  has 43,800 miles
« Last Edit: May 23, 2005, 06:15:08 am by Glenn Stauffer »

Online ofreen

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Re: Highest mileage on a SOHC?
« Reply #12 on: May 22, 2005, 11:17:12 am »
As of today, my '75 750F has gone 95,767 miles.
Greg
'75 CB750F


“A lie can travel half way around the world while the truth is putting on its shoes.”
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eldar

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Re: Highest mileage on a SOHC?
« Reply #13 on: June 03, 2005, 04:49:32 pm »
My 78 750k has only about 13000 miles. I am almost positive that is accurate mileage. Once I get everything running right, I plan on increasing that number by alot!

don_m

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Re: Highest mileage on a SOHC?
« Reply #14 on: June 03, 2005, 07:13:02 pm »
Well, I'm learning how to use & post camera images.  This is my first attempt to do so & hope it works  The green face speedo is the original off my CB350F & the dark blue, a 400F picked up new old stock years ago.  Will have to replace that one soon.  This is the modified 350F, 425cc for the last 25 years or so.  I have a gaggle of other bikes, too.
« Last Edit: August 25, 2007, 05:08:52 am by Glenn Stauffer »

don_m

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Re: Highest mileage on a SOHC?
« Reply #15 on: June 03, 2005, 07:18:58 pm »
I just looked at the images on my last posting.  The original  speedo is clear reading 99,999.9 miles but the 2nd is hard to see.  It reads 99,407.8 today but will be higher on Monday!
Cheers, Don Psycle Madden.

Offline rpyles

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Re: Highest mileage on a SOHC?
« Reply #16 on: June 03, 2005, 08:01:20 pm »
17294
Actually, I've added about 100 since I took the picture. It had about 7,000 on it when I bought it (the first time) in 1971.
Richard
« Last Edit: June 03, 2005, 08:06:48 pm by rpyles »
Richard Pyles - 70 CB750 K0

Offline Harry

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Re: Highest mileage on a SOHC?
« Reply #17 on: June 04, 2005, 12:15:39 am »
199,000+ miles & counting on my CB350F which I bought new in 1972.  The last 150,000 or more are after incleasing it to 427cc.  I recently rebuilt it to make it purty again.
Don (Psycle) Madden.

That amazing! Well, that proves the point the no-one knows how far an SOHC4 can go! Don, could you comment more on this, ie number of engine rebuilds, special tips, use of additives, religious blessings etc..
Harry Teicher, member #3,  Denmark....no, NOT the capital of Sweden.

don_m

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Re: Highest mileage on a SOHC?
« Reply #18 on: June 05, 2005, 08:15:27 pm »
I posted some history on another thread but can't remember where. Where? where? Oh where was I?  Bought the machine new in 1972 for commuting as was tired of my 2 stroke Kwacker smoking & loading up in low speed traffic.  The Kwacker was great for canyon thrashing but lousy for low speed commuting.  The 350F was nice for its intended work but rather anemic in our mountainous locale.  At about a couple of years old & maybe 25,000 miles or so the engine locked up, in a turn of course.  Only minor damage to either of us but upon taking the engine apart I found the primary link belt chain had started to come apart due to defective link pivots & jammed.  I was stamped "Hyvo" & Made in USA!  the replacement was Japanese & has served since without problems.  Since I had the motor apart anyway & oil was leaking from the head joint some experamenting was done.  I researched interchangability with other Honda fours & found that the crankshaft, rods & wristpins are in common with the 400F, as are the camshaft, valves & rocker box.  Cases, cylinder. pistons & head are different.  I measured 350F cylinder liners & compared with 400F pistons.  If bored to maximum over bore of the 400F pistons the engine would yield 425cc.  The original bore was 47mm & the maximum would be 52mm.  The large bore make the cyclinders thin at the bottom but I compared with my BSA B50MX, (500cc scrambler), with the 545cc kit & found it to be about the same.  The BSA engine gave no problems in open desert scrambles except being difficult to start, at least for me.  I turned the outer crowns of the pistons to prevent contact with the stock head.  Replaced all the gaskets, etc & several rocker arms due to flaking of the hard surfacing of the pads.  It looked like hard chrome facing.  Was astonished at the increase in low end torque & geared the bike to reduce the RPM at 70MPH from the original 7,000 to 6,000, about the same as a 400F.  Another 25,000  miles or so & a lot of oil leaking from the head again due to the rubber seals around the oil restrictors sqaushing into the overlarge hole in the head gasket.  Made up supporting rings surrounding the seals to confine them & they now hold up for many 10's of thousands of miles without leaking.  Also more of the rocker arms were damaged & some cam wear evident.  Having the head off again gave the opportunity for more enging development.  I replaced the trimmed pistons with unmodified new ones & chamfered the edges of the combustion chambers to match the piston profile, which yielded a perimeter squish band similar to more modern design.  While the heads externally had the smooth appearance of die casting the ports obviously were cast using sand cores as they were all rough & irregular.  Machining marks in the ports showed that they had been milled a short distance at both ends but nothing touched deeper.  Using a porting tool, riffle files, coarse & medium abrasive strips & a lot of hard work I blended the contours & surfaces inside but did not change the shape or size.  The improved engine ran better but was restricted with the original exhaust & air filter.  Experamented with various 4-2 systems but found the 400F pipe & a large  unrestricted muffler gave the best all around results.  Replaced the stock, restrictive air filter material with  Uni-Filter foam cut from bulk stock.  Naturally, all this made the carburation lean but upping the main jets cured that but at a cost of about 10MPG.  Had to upgrade the clutch to a Barnett 400F racing unit as the 350 could not hold the power.  The change is astounding!  On a steep grade with a headwind the original motor could not pull top gear.  Now with taller gearing it pulls the same grades at part throttle & cruises comfortably at 80MPH although top speed has only increased a few, from 92 to 98 but I have seen 100 on the clock on occasion.  The big change is in widening the power band.  It will pull full throttle from 25MPH in top with modest acceleration 'til 5,000 when the pull is strong & gets better with the revs up to 11,000.  That's a useful power band greater than 2 octaves!  No, it can't keep up with my 750 Bonneville but the performance compares well with my G12CSR but is more reliable.  Since then I've rebuilt the starter solenoid switch a couple of times & replaced the handlebar controls.  Replaced the cam chain twice using the rivet on link from the CB450 twin motor.  Replaced cam chain tension blade & guide twice.  Recently  a top ring shattered taking out the piston & liner too so replaced all that.  Replace the oil pressure sender to many times to count but no other major parts & has never left me stranded although my buddies think I'm a maniac.  I tell them the truth:  I learned to ride in Germany & ride like any European & they consider the pace as fast cruising.
Long & wordy, but we are talking 33 years & almost 200,000 miles here with a lot of experiences.
Cheers, Don Pscycle Madden.

Online ofreen

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Re: Highest mileage on a SOHC?
« Reply #19 on: September 03, 2005, 04:35:16 am »
The 750 turned over 98,000 miles yesterday.

Greg
75 CB750F
Greg
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“A lie can travel half way around the world while the truth is putting on its shoes.”
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Offline kghost

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Re: Highest mileage on a SOHC?
« Reply #20 on: September 03, 2005, 09:46:41 am »
Wow,

We have got to teach Don about the Paragraph, Cool story tho. ;D
Stranger in a strange land

don_m

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Re: Highest mileage on a SOHC?
« Reply #21 on: September 04, 2005, 07:34:37 pm »
Paragraph??  I don't remember finding any on my SOHC.  Kidding aside, I'm more careful with my grammer & spelling in hard copy documents but take less time with on-line postings to reduce file size & time.  No matter, the mutterings will all be lost the next time the server drive crashes!
Cheers, Don

Offline heffay

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Re: Highest mileage on a SOHC?
« Reply #22 on: September 04, 2005, 08:23:59 pm »
i agree don... if you guys havent noticed capitalization is a thing of the past in my book.
Today: '73 cb350f, '96 Ducati 900 Supersport
Past Rides: '72 tc125, '94 cbr600f2, '76 rd400, '89 ex500, '93 KTM-125exc, '92 zx7r, '93 Banshee, '83 ATC250R, 77/75 cb400f

Online ofreen

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Re: Highest mileage on a SOHC?
« Reply #23 on: October 20, 2005, 01:20:46 pm »
The 750 turned over 99,000 miles today.

Greg
75 CB750F
Greg
'75 CB750F


“A lie can travel half way around the world while the truth is putting on its shoes.”
― Mark Twain

Offline dusterdude

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Re: Highest mileage on a SOHC?
« Reply #24 on: October 20, 2005, 01:36:35 pm »
CAPTALIZATION,whats that?
mark
1972 k1 750
1949 fl panhead
1 1/2 gl1100 goldwings
1998 cbr600 f3

 

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