1983 BMW R100

[Zwicky, Eric]

Hey all, Yesterday afternoon I gave Mike a set of O-rings
I had extra.    He's going to drop the bowl on the right carb and 
replace the O-rings on the idle jet, idle-mixture screw, and the main 
jet stack, and spray everything thoroughly with carb cleaner.

If that doesn't solve the problem, I'll help him take apart the rest of 
the carb and clean it, as well as replace the throttle-shaft and 
enrichener O-rings, and whatever else needs attention.

BTW when I got to his garage on Friday to take a look, the bike had fire 
on the (externally-grounded) right plug, and we could see gas getting to 
the carb (clear fuel line).   But it would only run on the left 
cylinder, us deducing this by feeling the puffs of cold air from the 
right exhaust.    But with the enrichener engaged, the bike would 
actually fire on that side, albeit roughly, which pointed us to the carb 
as the culprit.

Mike's a bit daunted at the prospect of completely disassembling the 
carb(s), so he wants to do this less-invasive cleaning / restoration 
first.  My time is more limited, so he's going to try this first and 
then if needed I'll help him with complete disassembly and rebuilding.

Eric Zwicky
Richmond



On 10/11/2020 2:11 AM, Charlie Smith wrote:
> Mike,
> 
>    A good cleaning and a few new parts are WAY Cheaper than a new (or even used ) set of carbs!! Let's see what the folks on the list have to say.
> 
> Charlie #13
> ----- Original Message -----
> From: Mike Slavin <mkslvn5 at gmail.com>
> To: Charlie Smith <bmwcharlie at embarqmail.com>
> Sent: Sat, 10 Oct 2020 14:40:43 -0400 (EDT)
> Subject: Re: 1983 BMW R100
> 
> Charlie,
> I didn’t think about this possibility when I sent the last email to you, but it might be cheaper and easier just to buy a set of bing 40 carburetors in good condition.
> What are your thoughts?
> Mike
> 
> Sent from my iPhone
> 
>> On Oct 10, 2020, at 2:20 PM, Mike Slavin <mkslvn5 at gmail.com> wrote:
>>
>> Charlie
>> The new diode board solved my electrical problem. Yah! Unfortunately, the right cylinder is not running. I have spark and I think compression (I can feel air coming out of the spark plug hole). By taking the float baowls off I can tell that there is a lot of trash in the carburetors. I know I need to get my carburetors cleaned and possibly rebuilt. I don’t think I will need the full rebuild, but certainly diaphragms and some O-rings and some gaskets. Is there somebody affordable that I could send the carbs too for a clean/rebuild? Please let me know what you think. All the guys that you put me in touch with have been incredibly helpful and nice. The sense of community and fellowship is amazing. Thanks again for all of your help!
>> Mike
>> 804-405-9535
>>
>>
>> Sent from my iPhone
> 
>