Established 1993. The only club dedicated to all types of vintage garden tools and machinery

 
.....Find the NEW website and machinery forums at www.vhgmc.co.uk
 
  Active TopicsActive Topics  Display List of Forum MembersMemberlist  CalendarCalendar  Search The ForumSearch  HelpHelp
  RegisterRegister  LoginLogin
Projects
 VHGMC ForumsThe Main Forum AreaProjects
Message Icon Topic: JAP 600 side-valve details? Post Reply Post New Topic
Author Message
Biggles
New Member
New Member


Joined: 26 Sep 2013
Online Status: Offline
Posts: 7
Quote Biggles Replybullet Topic: JAP 600 side-valve details?
    Posted: 28 Sep 2013 at 12:57pm
Hi there.

A little while ago, I bought a 1939 Panther 250 motorcycle frame, fitted with a JAP 600cc SV engine. I was told the engine had come out of a rotovator, but I am having difficulty identifying the age and model of the engine. So, I am wondering if anyone here can help. The engine number looks to be  D07ZR   99701-8D  but the numbers are not that clear, so I could be wrong.

Any help would be appreciated. Thanks,

Brian

IP IP Logged
mowersman
Forum Member
Forum Member
Avatar

Joined: 07 Dec 2008
Online Status: Offline
Posts: 2817
Quote mowersman Replybullet Posted: 28 Sep 2013 at 2:08pm
Your serial number doesn't really match up with the standard one. Have a look here for dating an ordinary Jap number
http://www.donaldantiquerototillers.com/JAPEngineChart.htm
Some pictures may also help to date it, as there were a few changes over the years.
Andrew
The more I work with petrols, the more I like diesels...
Yeovil, Somerset
IP IP Logged
will_haggle
Forum Member
Forum Member
Avatar

Joined: 06 Apr 2008
Location: United Kingdom
Online Status: Offline
Posts: 3913
Quote will_haggle Replybullet Posted: 28 Sep 2013 at 6:24pm
They were fitted to big Cliffords and Howard Gems, but also to some big cylinder mowers.
6 months ago I couldn't even spell engineer - now I are one
Calne, North Wiltshire...
IP IP Logged
will_haggle
Forum Member
Forum Member
Avatar

Joined: 06 Apr 2008
Location: United Kingdom
Online Status: Offline
Posts: 3913
Quote will_haggle Replybullet Posted: 28 Sep 2013 at 6:30pm
Link to Clifford post, most Mk 4's had a BSA M20 engine....
Click for Clifford

And a Howard Gem one....
Gem post
6 months ago I couldn't even spell engineer - now I are one
Calne, North Wiltshire...
IP IP Logged
Biggles
New Member
New Member


Joined: 26 Sep 2013
Online Status: Offline
Posts: 7
Quote Biggles Replybullet Posted: 28 Sep 2013 at 6:30pm
The bike is in a friend's garage at the mo. I will get to it soon to check the numbers and take some pictures.
IP IP Logged
will_haggle
Forum Member
Forum Member
Avatar

Joined: 06 Apr 2008
Location: United Kingdom
Online Status: Offline
Posts: 3913
Quote will_haggle Replybullet Posted: 28 Sep 2013 at 10:49pm
Here's a post I put up a while ago, seems relevent to you..

Red Marley
6 months ago I couldn't even spell engineer - now I are one
Calne, North Wiltshire...
IP IP Logged
Biggles
New Member
New Member


Joined: 26 Sep 2013
Online Status: Offline
Posts: 7
Quote Biggles Replybullet Posted: 01 Oct 2013 at 5:46pm
Ok, so another look with a decent torch, and the engine number appears to be UCZ/R 99701/8D, which might make it a 1955 600sv sport engine, although what the 8D part means I have no idea.

I will need to get a cylinder head with the fins at 90% so they are in line with the air-flow, but apart from that it runs well as it is, especially as it is fitted with electronic ignition and a 12V alternator.

I have some pictures, if anyone wants them, but can't load them here.

Biggles

IP IP Logged
will_haggle
Forum Member
Forum Member
Avatar

Joined: 06 Apr 2008
Location: United Kingdom
Online Status: Offline
Posts: 3913
Quote will_haggle Replybullet Posted: 02 Oct 2013 at 9:42am
The two digits on the end (may be 80) is the type number and gives the changes made to suit the particular application. Unfortunately I've only got type information on the 2 strokes, but dealers have books that decode these type numbers and can tell you what mchine the engine was made for.
6 months ago I couldn't even spell engineer - now I are one
Calne, North Wiltshire...
IP IP Logged
Biggles
New Member
New Member


Joined: 26 Sep 2013
Online Status: Offline
Posts: 7
Quote Biggles Replybullet Posted: 16 Oct 2013 at 1:04pm
I have the bike back in my shed now, and the end number is just 8, with a big gap before a D stamped near the crankcase joint, which might not relate to the engine number. On the basis of this info, I can now get the bike registered.

Thanks for all your help guys.

Biggles

IP IP Logged
Biggles
New Member
New Member


Joined: 26 Sep 2013
Online Status: Offline
Posts: 7
Quote Biggles Replybullet Posted: 21 Oct 2013 at 5:22pm
All up and running now, but the tappets are rather noisy. Does anyone know what the clearances should be please, or can advise me where to look, as a quick internet search doesn't help much?

Thanks.
IP IP Logged
Biggles
New Member
New Member


Joined: 26 Sep 2013
Online Status: Offline
Posts: 7
Quote Biggles Replybullet Posted: 21 Oct 2013 at 7:24pm
Also, the spark plug is a NGK BCPR6ES, which I am pretty sure is not the correct one. It is a bit sooty, but I haven't run the bike for long enough to do a plug chop on it yet. As it is running with an Amal monoblock carb, it should be easy enough to tune it up properly.
IP IP Logged
Post Reply Post New Topic
Printable version Printable version

Forum Jump
You cannot post new topics in this forum
You cannot reply to topics in this forum
You cannot delete your posts in this forum
You cannot edit your posts in this forum
You cannot create polls in this forum
You cannot vote in polls in this forum



This page was generated in 0.047 seconds.