Services

Services

Classic British Spares has always been known as a "parts supplier", however many folks don't know that we actually do machine work and production work in house for classic British motorcycles 

Now granted our main focus is parts sales, however, we will start offering some small jobs that revolve around common issues that our customers face during a rebuild or restoration  

In this section you will find all of our services that we are currently offering. Please feel free to browse through the info below..

 

Triumph (Twins) Exhaust Spigot Thread Repair Service

 Triumph Exhaust Spigot Repair

 

A common problem found on vintage Triumph cylinder heads are stripped or worn exhaust threads 

This problem typically occurs when the exhaust spigot works loose in the head or "dodgy" repairs down the road that make the problem in fact worse 

 Our services we offer 

The services that we are offering today are designed to be a permanent fix and simple solution to prevent your exhaust spigot from backing out or ever working loose 
 The cost is $250 each hole - you will get the following service performed on your cylinder head 
  • Boring of existing exhaust threads 
  • Tapping new over-sized threads 
  • Custom made over-sized exhaust spigots 
  • Exhaust spigot threads sealed and torqued  

 

 Our tooling 

To execute each job properly we have dedicated tooling to offer you professional and quick results. Boring & tapping each cylinder head will be done using a JET mill and oversized spigots to be done on an ACRA lathe

For each oversize thread, we use thread checking rings to ensure both our cylinder head threads and exhaust spigot threads remain a close and tight tolerance which will contribute to better thread engagement and longevity 

Applications

This “in house” service we are offering is for Triumph 650 unit twins from 1963-1970 & Triumph 350 & 500 unit twins from 1957-1970. We are also offering this service for Triumph pre-unit twins that have an "alloy" head up to approx 1962..
 

 How to order & shipping info

To have CBS get your cylinder head back in working order, please send us your cylinder head so we can start and finish the job 

Before you send us your head, please contact us prior using the the contact us form found at the very bottom of this page

Cylinder head must be in GOOD condition, poor quality heads will be sent back and service refused 

Send your head to the following address

Classic British Spares, INC

ATTN: Services

12623 west c10 

Lancaster, CA 93536 

 

 Once the job is complete we will send you an invoice for return shipping payment - to be clear, you are responsible for paying shipping for your swingarm to and from CBS.

Allow a 1-2 week turnaround 

 

Triumph / BSA (OIF) Twins Swingarm Bushing & Reaming Service - 1971-86

Triumph OIF Swingarm Reaming Service

Replacing your swingarm bushings is a simple task, however, making sure they are sized correctly is challenging 

When you install new swingarm bushings each bushing will need to be lined reamed to ensure that your swing arms pins have the proper working clearance 

Triumph & BSA OIF (Oil In Frame) twins require 4 bushings that come “undersized” for final boring as offered originally by the factory  

You cannot achieve the .001”-.0015” working clearance and alignment by using a ball hone or master cylinder hone… you must ream all bushings 

 

Click here to purchase a new of bushings, pins & rubbers

 

 Our services we offer 

Luckily to combat this challenging task, we are now offering 3 “in house” services - $150 for the service 

 
  • Remove all original swing arm bushings 
  • Install new swingarm bushings
  • Line reaming each bushing

 Our tooling 

To execute each job properly we have dedicated tooling to offer you professional and quick results. We use a custom made bushing removal and installation tool along with a Z124 factory service tool that will ream each bushing to the proper 1” bore size 
 

Applications

This “in house” service we are offering is for Triumph 650 & 750 twins from 1971-1986 and also for BSA 650 twins from 1971-1972 
 

 How to order & shipping info

To have CBS get your swingarm back in working order you will have to send us your original swingarm and bushings for us to able to start and finish the job 

Before you send us your swingarm, please contact us prior using the contact us form found at the very bottom of this page

All bushings must be in the swingarm, do not remove ANY bushings

Send your swingarm and parts to the following address

Classic British Spares, INC

ATTN: Services

12623 west c10 

Lancaster, CA 93536  

 Once the job is complete we will send you an invoice for return shipping payment - to be clear, you are responsible for paying shipping for your swingarm to and from CBS.

Allow a 2-3 day turnaround