Author Topic: Honda cb175k6, 1972 re-build  (Read 3214 times)

Offline TGR90B

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Re: Honda cb175k6, 1972 re-build
« Reply #120 on: November 10, 2020, 02:57:42 PM »
Haven't you got one of those posh 4 wheel motorbike things for cruising around your acres?
Getting grumpy, but not as grumpy as mini-me.

Offline Terrotmt1

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Re: Honda cb175k6, 1972 re-build
« Reply #121 on: November 10, 2020, 03:55:18 PM »
Indeed mini, each to their own and that is good, we should keep an open mind.
Been labouring for the Head Gardener on the Estate today, so I know my place, and not a ride-on in sight.

Last part of the rebuild is coming from the USA, about the only place now where parts are available as bits drying up fast.
5 years ago parts were easy and cheap, not anymore.
I should have checked before I bought this bike..

A few posts ago it was mentioned to get parts made/cast etc using 3D printing and CAD, I ran a large design dept when working and spent a lot of time with these methods every day.

I considered using 3D printing to have made the plastic side panels, the left is a mirror of the right, so seemed a good route seeing as a pair was about 250 without the rare badges.

Quotes came back around 550 for the pair +vat etc and 3 weeks, many also wanted one real part to scan and then to print after for that.

I paid the 250 for parts, left side was 28, the rarer right side the rest. The badges on each side sell in the USA for 90 each and tend to be damaged. I bought a knackered one, cleaned it up and resin cast 6 for 25, painted them in with Humbrol paint and a steady hand.
 A pair with badges appeared on ebay for 67 3 weeks later!
Non of this is easy. ;)
« Last Edit: November 10, 2020, 03:59:58 PM by Terrotmt1 »

Offline Rex

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Re: Honda cb175k6, 1972 re-build
« Reply #122 on: November 10, 2020, 05:47:38 PM »
It seems that put a few year-incorrect parts on a Jap resto and the value is considerably decreased, and that's why I could never get into Jap restoration...too many anoraks!
My 1951 A7 (for example) has a 1953 tank on it, but few would know and even fewer would care, but then I don't do originality for the sake of it, and it isn't that critical to the value of an old British bike, generally speaking. I seem to be lucky though as I'm not plagued with originality buffs asking about the handlebar clamps or whatever.
Lola looks nice in her undergarments though.

Offline mini-me

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Re: Honda cb175k6, 1972 re-build
« Reply #123 on: November 10, 2020, 08:00:19 PM »
https://youtu.be/NFwP2huyNzg

no knicker pics though.

Offline TGR90B

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Re: Honda cb175k6, 1972 re-build
« Reply #124 on: November 10, 2020, 09:30:07 PM »
Can't we have a bit of Billy Fury instead?
Getting grumpy, but not as grumpy as mini-me.


Offline mini-me

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Re: Honda cb175k6, 1972 re-build
« Reply #126 on: November 11, 2020, 10:13:28 AM »
suit yourself, I'm a lot further back than that............

same as tgr90. he's still waiting for someone to invent music :o

Offline Terrotmt1

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Re: Honda cb175k6, 1972 re-build
« Reply #127 on: November 13, 2020, 04:35:57 PM »
The iffy carbs are bugging me, so thinking of adapting some Dellorto knock-offs to suit.
Very cheap and you can get a wide range of jets for tuning them.

Why?
Advantage is absolutely clear drillings in the bodies and they install on the very same mounting holes to the Keihin originals.
Disadvantage? A step into the unknown....
Could irritate a few on here too! :)

Could be interesting side project too.

Offline Rex

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Re: Honda cb175k6, 1972 re-build
« Reply #128 on: November 13, 2020, 07:17:43 PM »
Dunno who it might irritate, but an old boy I know is now reduced to riding a Tiger Cub. He's a rider and machinist of many years experience but this Cub's carb had him tearing his remaining hair out, so he finally in desperation sprung fourteen quid for one of those Chinese carbs things off Ebay
Fitted straight on and other than a adjustment of the tickover speed it's been perfect straight out of the box.
Maybe he was just lucky, but at 14 it was worth a go.

Offline Terrotmt1

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Re: Honda cb175k6, 1972 re-build
« Reply #129 on: November 13, 2020, 10:29:51 PM »
Thanks Rex.
I'll check the jet sizes tomorrow and any other fitting  details, and if ok will buy a pair.
They are available in England for that money, so not a big issue.
Time will tell, fingers crossed.

Offline Terrotmt1

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Re: Honda cb175k6, 1972 re-build
« Reply #130 on: November 23, 2020, 11:19:40 PM »
Bit of a rollercoaster ride on the honda.
Got the carbs, now on the bike and it runs, not that well but I need to try harder on the fine tuning.
however, the starter system (electric) is giving me some jip, and that side of the engine is apart again.
Seems to me the starter gear bearing (runs on the crankshaft) is well worn, the play is about 0.5mm.

Thus, awaiting a nice oilite bush/sleeve to arrive so I can machine to size and get rid of the excessive play. I've replace everything else, so I hope this is the root of the chattering noise and the slipping of the drive to start the motor.

Job for the weekend I hope while the wife watches the GP. :)

Offline Rex

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Re: Honda cb175k6, 1972 re-build
« Reply #131 on: November 24, 2020, 08:39:11 AM »
I had a CD200 as a winter hack for years and reliability-wise it was the best bike I ever had, which was handy as I used it to commute to work. The electric start was marginal even when new so when the battery went west I used a cheaper non-electric start lower capacity battery and the kickstart.
When it came time to move the old girl on (2015) the bloke who had it said he was amazed that the starter motor etc still worked but then I'd never used it.
As he said, the sprag rollers usually develop flats and slip rather than grip, and the test is to lean the bike over and try using the electric start, as the rollers then tend to grip. New rollers are cheap enough though

Offline Terrotmt1

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Re: Honda cb175k6, 1972 re-build
« Reply #132 on: November 24, 2020, 04:51:45 PM »
Interesting!
I have installed new rollers, springs and cups, cheap at 17 the set and real Honda parts too.
The drive chain similarly, all new, good and tight and cost a lot more, but Honda NOS, 33.

This bush is the last bit that keeps the rollers true to the gear journal and to the crank shaft.
Should be with me for the weekend I've been promised.
Found a local company too that make replacement oem spec gaskets individually, 7 each for the side cover, bargain.

I have to admit I've found, since installing the engine and all around it that I've miss-assembled the kick starter shaft so I only have 1/2 the travel... :-[