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Tech. Advice: Series 'B' / 'C' 500cc/1000cc Bikes
MK1 carb tuning and BTH noise?
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<blockquote data-quote="Ducdude" data-source="post: 24752" data-attributes="member: 2077"><p>Well family stuff got in the way of quality wrenching time this week end. </p><p>So, I picked an easy job and just swapped the 210 mains for a set of 230's </p><p>in my shadow's MK1's. I did this due to the evidence, poor top end </p><p>performance and pipe bluing , and the recommendations on the lists had </p><p>pointed to a lean running condition.</p><p> </p><p>Sure it is an easy job but I had to drag out the lift and strap her down and </p><p>the tank had to come off and the battery has to come out to get the carbs </p><p>out and then the bowls off. No matter how careful I am I always end up </p><p>dumping at least one bowl of fuel on the work bench.:-( That and I was </p><p>working at a snails pace today due to a late 0200hrs night the night </p><p>before...BTW real good single malt scotch (Islay) will not give you a hang </p><p>over if you match shot for shot with 6oz of water....That was the plan any </p><p>way...once vision returns to BOTH eyes I will let you the final results..:-o</p><p> </p><p>Side bar....there was a bit of sediment on the bottom screen of the lower RH </p><p>carb, I had better keep an eye on this as the bits got by the in line filter </p><p>and the petcock screens...hmmm?</p><p> </p><p>So, how did the 230's feel. Sadly, I only had time for an around the town </p><p>jaunt without re-tuning the carbs air mixture screws to optimize the new </p><p>jets but here is what I found...Man was the bike hard to start...Took +4-5 </p><p>kicks...She came off the chokes in 0.01 sec.s and seemed to be behaving </p><p>normaly for warm up otherwise...Did a quick run to get some petrol in the </p><p>tank and man what a pain she was to start again...After the gas stop I did a </p><p>blast on a 1/2 mile run and the acceleration was noticeably more potent. </p><p>However, I could tell that the running was not smooth due to a lack of warm </p><p>up and what I have to believe is a to rich condition requiring a good bit of </p><p>tuning on the air screws...</p><p> </p><p>Time ran out and I had to put the bike away before I could get her good and </p><p>warm to dial the carbs in...So, next week will see a continuation of this </p><p>work...By then the new mag gear will be here to try to quell the timing case </p><p>whine and I will have time to get her on the motor way and see if the ton </p><p>finally comes up on the old girl....</p><p> </p><p>Another fine day in Vincent land...</p><p> </p><p>Cheers,</p><p>Eric</p></blockquote><p></p>
[QUOTE="Ducdude, post: 24752, member: 2077"] Well family stuff got in the way of quality wrenching time this week end. So, I picked an easy job and just swapped the 210 mains for a set of 230's in my shadow's MK1's. I did this due to the evidence, poor top end performance and pipe bluing , and the recommendations on the lists had pointed to a lean running condition. Sure it is an easy job but I had to drag out the lift and strap her down and the tank had to come off and the battery has to come out to get the carbs out and then the bowls off. No matter how careful I am I always end up dumping at least one bowl of fuel on the work bench.:-( That and I was working at a snails pace today due to a late 0200hrs night the night before...BTW real good single malt scotch (Islay) will not give you a hang over if you match shot for shot with 6oz of water....That was the plan any way...once vision returns to BOTH eyes I will let you the final results..:-o Side bar....there was a bit of sediment on the bottom screen of the lower RH carb, I had better keep an eye on this as the bits got by the in line filter and the petcock screens...hmmm? So, how did the 230's feel. Sadly, I only had time for an around the town jaunt without re-tuning the carbs air mixture screws to optimize the new jets but here is what I found...Man was the bike hard to start...Took +4-5 kicks...She came off the chokes in 0.01 sec.s and seemed to be behaving normaly for warm up otherwise...Did a quick run to get some petrol in the tank and man what a pain she was to start again...After the gas stop I did a blast on a 1/2 mile run and the acceleration was noticeably more potent. However, I could tell that the running was not smooth due to a lack of warm up and what I have to believe is a to rich condition requiring a good bit of tuning on the air screws... Time ran out and I had to put the bike away before I could get her good and warm to dial the carbs in...So, next week will see a continuation of this work...By then the new mag gear will be here to try to quell the timing case whine and I will have time to get her on the motor way and see if the ton finally comes up on the old girl.... Another fine day in Vincent land... Cheers, Eric [/QUOTE]
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Tech. Advice: Series 'B' / 'C' 500cc/1000cc Bikes
MK1 carb tuning and BTH noise?
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