Carburettor refurbishment
Posted: Tue Sep 24, 2013 12:01 am
I have just got my carb back from Martyn Bratby and what an excellent job he has made of it too!!! I was toying with the idea of replacing the thing with a new one (389 monobloc) but was a bit concerned about the comments I have read regarding the quality of these new ones etc so I decided to go for a refurb.
Not only did he re-bore the body and fit an oversize brass faced throttle slide (which fits perfectly with no play whatsoever) He re-cut the top thread on the body and supplied a new undersized top ring, made a new o/size jet block screw to replace my stripped one (the one that screws in the side of the carb body to stop the block from moving), supplied a new brass float needle which replaces the viton tipped one, re-machined the float chamber cover, supplied a new banjo bolt (fuel inlet) , supplied a new choke spring brass tube + all the relevant gaskets etc and finally jet/sandblasted the whole thing to make it look nice... the total cost? £60.95... Ok, I had to pay postage (Royal mail special delivery both ways ) at £11 each way but I have a probably better than new carb for under £85.00.. And, importantly, the bike runs a treat, ticks over evenly and the stutter/splutter I used to get on the initial throttle opening has now gone and it takes up cleanly and smoothly.. Only one downside.. be prepared to be without your carb for about 8/9 weeks but HIGHLY RECOMMENDED...
Martyn Bratby
No1 The Coachouse Works
Limepit Lane
Huntington
Cannock
South Staffs
WS12 4PA
tel/fax 01543 572583
mobile 07772169524
Not only did he re-bore the body and fit an oversize brass faced throttle slide (which fits perfectly with no play whatsoever) He re-cut the top thread on the body and supplied a new undersized top ring, made a new o/size jet block screw to replace my stripped one (the one that screws in the side of the carb body to stop the block from moving), supplied a new brass float needle which replaces the viton tipped one, re-machined the float chamber cover, supplied a new banjo bolt (fuel inlet) , supplied a new choke spring brass tube + all the relevant gaskets etc and finally jet/sandblasted the whole thing to make it look nice... the total cost? £60.95... Ok, I had to pay postage (Royal mail special delivery both ways ) at £11 each way but I have a probably better than new carb for under £85.00.. And, importantly, the bike runs a treat, ticks over evenly and the stutter/splutter I used to get on the initial throttle opening has now gone and it takes up cleanly and smoothly.. Only one downside.. be prepared to be without your carb for about 8/9 weeks but HIGHLY RECOMMENDED...
Martyn Bratby
No1 The Coachouse Works
Limepit Lane
Huntington
Cannock
South Staffs
WS12 4PA
tel/fax 01543 572583
mobile 07772169524