I have a few questions regarding the pop-off pressure on a 93 SL750. I have just installed a new SBT motor and rebuilt the carbs and am having issues with the carb set-up. The pop-off is too weak and actually flooding the engine while starting.
1 - My first question is if you supply Mikuni parts in your rebuild kits? I ask because I tried the lightest spring in the kit in an attempt to increase the pop-off and the pressure was double what I had with the original spring.
2 - This leads to my second question, did Polaris set these carbs up with springs that are not standard? I noticed in Polaris parts diagram they list the spring as Mikuni # 730-03032 but this is not one of the 4 springs listed in Mikuni's manual.
3 - What do recommend as a starting point. The original spring was popping around 17psi (Polaris specs 10-18psi) and the smallest spring in the rebuild was holding beyond 30psi (my gauge only reads up to 30). Thought I may have installed the new spring incorrectly, but repeated the test with the original and had the same result. I know I need to increase the pressure since it is leaking but 30psi seams a bit much. I am considering ordering the spring from Polaris to see what it turns out to be, but wanted to see what anyone knew about this first.
1 - My first question is if you supply Mikuni parts in your rebuild kits? I ask because I tried the lightest spring in the kit in an attempt to increase the pop-off and the pressure was double what I had with the original spring.
2 - This leads to my second question, did Polaris set these carbs up with springs that are not standard? I noticed in Polaris parts diagram they list the spring as Mikuni # 730-03032 but this is not one of the 4 springs listed in Mikuni's manual.
3 - What do recommend as a starting point. The original spring was popping around 17psi (Polaris specs 10-18psi) and the smallest spring in the rebuild was holding beyond 30psi (my gauge only reads up to 30). Thought I may have installed the new spring incorrectly, but repeated the test with the original and had the same result. I know I need to increase the pressure since it is leaking but 30psi seams a bit much. I am considering ordering the spring from Polaris to see what it turns out to be, but wanted to see what anyone knew about this first.
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