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April 19, 2018
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Here's an old post with the sizes. I get mine from Simply bearings too.Â
Jimmie said
My D7 has got a very second hand engine unit. Could someone give me the size/ref for the bearings as the existing ones are of the red type, ie rusty. Many thanks
Jimmie,
First, get a parts book for your bike. These are availble reasonably widely and are invaluable.
Her are the bearing details:
The inner crankshaft bearings are: LS8 or LJ3/4 or RLS6
The outer crankshaft bearing is: 6203 or Hoffman 117
The gearbox output bearing is: KLNJ7/8 or Hoffman S9 or EE8 or SMT R14
The mainshaft bearing (clutch) is: LS7 or LJ5/8
They may also have other part numbers and for reference Hoffman are no longer with us.
I have always found this firm speedy with their deliveries  ** Please log in to view ** as are T&G motorcycles. Local bearing stockests are good (because they are local) as are some other Bantam parts suppliers.Â
Similarly, you can source all the seals from stockists - sizes here ** Please log in to view **
Or get a set all made up from one of the many suppliers online
.
 '55 D3 Battery; '58 Square Four (project); '59 D1 direct lighting plunger; '59 Tiger Cub; '60 5TA; '76 FS1-E; '91 GTR 1000; '97 Honda Sky SGX50.
December 12, 2018
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Hi bantammad ere here is a way of working out approximately how many extra chain links you may require look too see what you need lets say 14 t and 47 t you 120 links as a ball park figure now you gonna fit 58t drive sprocket so you require 11 more links follow me have fun regards LES
October 31, 2019
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Hi
i have sorted the main bearings now, a right saga and moved on to the exhaust system. I have also bought a D7 3 speed engine, was too good an offer to refuse with reborn; new piston and all new bearings and seals. I will run this engine in the D3 frame but will still finish the D3 engine rebuild. I have also found an Amal 375 carb as well though having a few minor issues, see my post in the D7 section.
the original D3 exhaust is not really suitable so I want to buy a trails system that is lighter. Can anyone recommend where I can get a pipe and silencer from that would fit my bike. I’ve had a look on the tintetnet but can’t find a system precisely made for a bantam. I guess other models may fit but don’t want to risk it until I’m sure
happy ChristmasÂ
best Paul
October 31, 2019
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hi
i am struggling to find an alloy silencer and pipe for my bantam trails build. I think I will put on a D7 high 13/8 trails pipe but not sure where to get an alloy silencer that will fit this pipe.
i have just found out that I can get pipe diameter changers so the silencer does not have to fit the front pipe exactly.
can anyone recommend an alloy silencer that will allow the D7 engine to run properly.Â
All help much appreciated by this novice
cheers
Paul
October 31, 2019
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Hi, still trying to get my D3 with a D7 engine running properly but getting there.
i was originally going to keep the original D3 forks and rear shocks and may still do.
However I want to explore replacing both, I have read a set of threads replacing them with Honda or Suzuki forks but can’t really tell if that mod would fit a D3 (swing arm model). Can anyone suggest a more modern front fork replacement that allows me to still use the D3 wheel.
Can anyone also recommend a set of rear shocks, light in both weight and expense,
best
Paul
November 16, 2011
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Hi Paul,
If you`re going to change the Bantam look to the extent of fitting modern forks, aren`t you tempted to have better brakes too?
To incorporate the D3 wheel into modern forks, it`s probably best just to offer it up and then measure up for spacers and spindle/bearings, brake back-plate anchor arm etc. Get someone to knock you the bits up? Mudguard mountings may be an interesting challenge.
I have a Bantam Cub that previous owner put a complete unmodified CG125 front-end onto, so only mod was to the Bantam Cub headstock, which I see has had new bearing cup holders welded top & bottom. This was necessary because the Hondas etc have longer headstocks.
Blue
Don't forget that any other bike's suspension will be designed to work properly with that specific weight, wheelbase, rake, wheels, tyre sizes, etc and could make your bike handle worse even though the parts are "better".
Just my opinion, but I've never understood the point of getting a bike and then turning it into a different bike. Why try and turn a bantam into a cg125 (for instance) when you may as well just get the Honda in the first place?Â
May 14, 2014
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Is your bike already registered with a V5? If it isn’t, then changing the forks for non original will make your life more difficult. If you have a Bantam because you like them, why turn it into something different? I have seen quite a few Bantams which have been modified in many different ways - Honda engines, Honda forks, frame altered even different fuel tanks and wheels. But then is it a Bantam any longer? Why buy a Bantam in the first place if you are going to change it all and make it a mongrel? Put the later Bantam forks on if you like, but try to keep it all Bantam. However, it’s your bike and you can do as you please with it. If you want Honda forks that’s your choice and plenty have done it before.
Current bikes......1958 D5, and a 76 Honda C90 in the workshop.
January 9, 2013
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D 1,3&5   WILL NOT  acsept  the  D 7  onward  forks   nor  are  the  D 3& 5  s/a   frame   harfs   interchageable   without  DRASIC  WELDING  done  so  i  dont  think  honda  forks  will  ethr  and  never  seen   them   on here  ,,  so i  think  somone  proov   me  rong
January 2, 2014
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Hi Paul,
Are you in the process of creating a D3 off road/ green laner. Is this why you are asking about modified suspension.
Nick
1950 BSA D1 Plunger  242 UYW
1966 BSA D7Â LBF 62 D
April 19, 2018
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EDIT: posts moved over here as it's all related....
 '55 D3 Battery; '58 Square Four (project); '59 D1 direct lighting plunger; '59 Tiger Cub; '60 5TA; '76 FS1-E; '91 GTR 1000; '97 Honda Sky SGX50.
November 16, 2011
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NeilB said
Just my opinion, but I've never understood the point of getting a bike and then turning it into a different bike. Why try and turn a bantam into a cg125 (for instance) when you may as well just get the Honda in the first place?  Â
Blue`s reply:- Yeah, I personally prefer the original look , so will be changing it back to std. It will mean I have to take the grinder to the headstock......carefully.
My cheap Cub with CG125? front-end, is jammed in between my D7 and D10 in storage, but happy to take photos for anyone who is  considering a similar mod. Will have to be via email though. I completely understand someone building up a bike from bits and  bobs....using whatever`s available 🙂
Sunny said...
"D 1,3&5   WILL NOT  acsept  the  D 7  onward  forks   nor  are  the  D 3& 5  s/a   frame   harfs   interchageable   without  DRASIC  WELDING  done  so  i  dont  think  honda  forks  will  ethr  and  never  seen   them   on here  ,,  so i  think  somone  proov   me  rong"
Blue`s reply:- Sunny, would you like a photo of my D5 with heavyweight forks 🙂 ......plus my Bantam Cub with Honda front-end 😉 Previous owner extended headstock top & bottom, as mentioned above.
Paul,
Go for it mate, we`re right behind you...almost anything is possible.
Cheers,
Blue
January 9, 2013
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i an  sorry  my  lac  of  the  writen  word  limits me  some wot    be  useles  at  english    so  have  to  say  thay  will  but  with  probams  the  tern  stops  are  a case  in piont   its  not  werth  the  hasle    and  if  i  inspeced  such  a  choped  bantam  it  woud  not get  a  riten  confermtion  from  me   as  i  said  sorry  to  have  to  mack  a  point  ,,  being  an  ex  Helth  &  Safte  Rep for  the  ISTC your  heth  &  well  being  is upermost  in my  mind
November 16, 2011
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Read you just fine Sunny.....and value your deep knowledge on Bantams etc  🙂
Yes, be careful folks, your life may depend on it.
Modified work by the skilled is just fine.
Blue(qualified welder, fabricator, mechanic and MOT tester) 😉
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