In an earlier post, I told of my troubles with a '95 model DT115. It doesn't get full rpm under load. Originally, I thought (still do) that the problem is related to the CDI unit (via throttle position switch) not allowing full spark advance. It only gets 3000rpm under load, but will do 6K in neutral.<br /><br />A couple of you folks (Thanks!) posted that they thought it was probably gummy carbs, so I spent all day today trying to use spray cleaner on them, as well as run 5 gals of clean fuel and carb cleaner mixed. No Change in performance.<br /><br />Another thought just occured to me. If there is a restriction or faulty fuel pump, could that cause a limited high rpm? (runs smoothly, just slow under load)<br /><br />I would think that a lean fuel mix would cause erratic engine performance (that's why I discounted fuel problems in the beginning).<br /><br />Questions:<br />1. If the fuel pump couldn't "keep up" with needs, would it limit top rpm (yes) while engine still runs smoothly?<br />2. Barring buying an in-line pressure gauge - is there a simple test to ensure pressure/flow is sufficient?<br />3. Any other ideas? (I'm trying everything to avoid buying the CDI unit @ $1K)<br /><br />regards,<br />Jim 
