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Author Topic: Possibly entering the 378 club!  (Read 4710 times)

Offline MiniatureNinja

  • Posts: 480
Re: Possibly entering the 378 club!
« Reply #40 on: Jun 30, 2018, 12:34:15 »
Pj, I've used stainless valves on cast guides for years in automotive application. The KPMI valves are microscopically coated anyway, should not need bronze guides according to their tech qa https://www.kpmi.us/tech-support---faq.html

I did in fact call them and they assured me the factory guides in cb350s and cb360s have been used successfully.
« Last Edit: Jun 30, 2018, 12:36:15 by MiniatureNinja »
'75 Honda CB360 - thread

Offline Sderbyshire

  • Posts: 254
  • Into Sailing, classic Triumph cars and motorbikes.
Re: Possibly entering the 378 club!
« Reply #41 on: Jun 30, 2018, 13:58:44 »
So, rebuilt the engine, fitted the ancilliaries and it fired right up!

But only running on one cylinder.

Right cylinder not contributing to the fun and spark plug seems to be dry so probably a fuel issue.

I’ll investigate tomorrow.

Pics, and video!, to follow shortly :-)

Steve

Offline crazypj

  • Posts: 13199
  • Split personality, I fake being smart
Re: Possibly entering the 378 club!
« Reply #42 on: Jun 30, 2018, 16:17:58 »
Great to hear it's a runner.. Use stock Kei-Hin pilot jets instead of aftermarket kit ones. Set float height to 21mm. CJ carbs are exactly the same as late CB (I brought a set back last time I was 'home')
'you can take my word for it or argue until you find out I'm right'
Best thing I ever overheard
"yep, PJ's my boss, he taught me everything I know, just didn't teach me everything he knows"
Brian Morgan, 1982

CB360's,  http://www.dotheton.com/forum/index.php?topic=11736.0
XS650,  http://www.dotheton.com/forum/index.php?topic=11922.0

Offline Sderbyshire

  • Posts: 254
  • Into Sailing, classic Triumph cars and motorbikes.
Re: Possibly entering the 378 club!
« Reply #43 on: Jul 01, 2018, 05:43:21 »
Up early and re timed the ignition, as wasnt confident it was correct, and we have success!

A quick spin around the block indicates a beefier sound and strong pull at low revs, and clutch slip as soon as the motor get to about 7k. Which is disappointing as i did fit ‘heavy duty’ clutch springs. Sourced on ebay so maybe crap.

I wonder if i need new friction plates as well as hd springs?

Where’s a good source for springs and plates guys ?

I’m very happy the bike is running properly as this was my first engine rebuild, albeit only the top end.

Here’s a pic of the CB389 resting after its first run.

Offline crazypj

  • Posts: 13199
  • Split personality, I fake being smart
Re: Possibly entering the 378 club!
« Reply #44 on: Jul 01, 2018, 14:32:31 »
I only use Bore-Tec springs for 'race' 350's. Were they thicker wire and slightly shorter than stock Honda? EBC do a set but I haven't tried them. Stock plates are probably better than anything else Barnett tend to 'grab' a bit but are a lot better than 30+ yrs ago when they were 'drag race only' Glad you have a very noticeable difference in performance, it's even better when clutch stopps slipping as you have at least another 3K to go  8) 8)
« Last Edit: Jul 01, 2018, 14:35:59 by crazypj »
'you can take my word for it or argue until you find out I'm right'
Best thing I ever overheard
"yep, PJ's my boss, he taught me everything I know, just didn't teach me everything he knows"
Brian Morgan, 1982

CB360's,  http://www.dotheton.com/forum/index.php?topic=11736.0
XS650,  http://www.dotheton.com/forum/index.php?topic=11922.0

Offline Sderbyshire

  • Posts: 254
  • Into Sailing, classic Triumph cars and motorbikes.
Re: Possibly entering the 378 club!
« Reply #45 on: Jul 01, 2018, 15:44:50 »
Hi PJ

The ‘heavy duty’ springs are longer than standard and seem to be the same thickness/strength.

I’ll look out some of the ones you recommend.

What do you think of EBC clutch plates?

Really looking forward to giving the new motor a good blast once the clutch is fixed!

Steve

Offline trek97

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Re: Possibly entering the 378 club!
« Reply #46 on: Jul 01, 2018, 17:35:42 »
Bore-tech is closing the doors, due to health issues.  so when they're gone - they're gone.

I was glad to see they still had the springs available when I ordered them for Piglet, I ordered an extra pair just to have on the shelf for any future bikes.
« Last Edit: Jul 01, 2018, 17:47:13 by trek97 »

Offline Sderbyshire

  • Posts: 254
  • Into Sailing, classic Triumph cars and motorbikes.
Re: Possibly entering the 378 club!
« Reply #47 on: Jul 01, 2018, 18:28:20 »
Had a search and found the bore-tech site.

Springs very reasonably priced but shipping quoted at $55 which is a bit silly.

Guess i’ll try ebc!

Steve


Offline crazypj

  • Posts: 13199
  • Split personality, I fake being smart
Re: Possibly entering the 378 club!
« Reply #48 on: Jul 01, 2018, 18:58:17 »
USPS went nuts a couple of years ago so shipping is crazy for anything outside USA. Medium flat rate box used to be around $27.50, last time I looked it was $48.00 to Britain. Even sending stuff to Canada more than doubled. Even so, $55.00 is way OTT as about 6 sets of clutch springs would fit in a small flat rate box and that should only be around $20.00 or less.If you could find a few more people who wanted them you could have them sent to me and I could re-post to you with Customs Declaration, I doubt a single set would be cost effective?
'you can take my word for it or argue until you find out I'm right'
Best thing I ever overheard
"yep, PJ's my boss, he taught me everything I know, just didn't teach me everything he knows"
Brian Morgan, 1982

CB360's,  http://www.dotheton.com/forum/index.php?topic=11736.0
XS650,  http://www.dotheton.com/forum/index.php?topic=11922.0

Offline irk miller

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Re: Possibly entering the 378 club!
« Reply #49 on: Jul 01, 2018, 19:26:37 »
I ship all over the US and world with parts I make and sell.  I don't get hit with shipping like that at all.  I just shipped some parts (rubber plugs) to Australia for $13.54. First Class International.