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Problems with 4-throttles !!!
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<blockquote data-quote="levin818" data-source="post: 1204502" data-attributes="member: 849"><p>Hey guys,</p><p>Thanks for the great idea! I will try it out when i get the Carb Balancer (still have no idea where i can borrow this stuff).</p><p>Just for your info, 1st gen ITB is damn lousy. When pulling the throttle's cable, i can see that the 1st and 2nd butterfly is leading 3rd butterfly, and the 3rd is leading the 4th.... they aren't syncronize at all... with all lock nuts seal with original yellow paint from factory. Moreover the 4th is opened wider at resting position. This explained why i always have a different burning colour at the 4 spark plugs' tips.</p><p>I just had a looked at my spare 1st gen ITB (already striped into pieces, so don't know how is the butterfly scyncronization status) 4 bypass screw's position, suprisingly all are at same position, that is 4.2mm from the top end position. It explain why my engine is running at 1000rpm idling with 3.5mm ~ 3.7mm position (may be my mech has adjusted these 4 screws due to previous idling problem). So before i get a Carb Balancer, I will first try to move all screws to 4.2mm and see if i can bring down the idling to 800rpm.</p><p>Perhaps, i will have better FC after syncronize the 4-throttles.</p><p></p><p>Will update later.</p></blockquote><p></p>
[QUOTE="levin818, post: 1204502, member: 849"] Hey guys, Thanks for the great idea! I will try it out when i get the Carb Balancer (still have no idea where i can borrow this stuff). Just for your info, 1st gen ITB is damn lousy. When pulling the throttle's cable, i can see that the 1st and 2nd butterfly is leading 3rd butterfly, and the 3rd is leading the 4th.... they aren't syncronize at all... with all lock nuts seal with original yellow paint from factory. Moreover the 4th is opened wider at resting position. This explained why i always have a different burning colour at the 4 spark plugs' tips. I just had a looked at my spare 1st gen ITB (already striped into pieces, so don't know how is the butterfly scyncronization status) 4 bypass screw's position, suprisingly all are at same position, that is 4.2mm from the top end position. It explain why my engine is running at 1000rpm idling with 3.5mm ~ 3.7mm position (may be my mech has adjusted these 4 screws due to previous idling problem). So before i get a Carb Balancer, I will first try to move all screws to 4.2mm and see if i can bring down the idling to 800rpm. Perhaps, i will have better FC after syncronize the 4-throttles. Will update later. [/QUOTE]
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Problems with 4-throttles !!!