Downgrade 787 to single carb?

[truck240]

I am thinking of buying a 97 GTX and wondered if the dual carb set up can be downgraded to use the 717 intake & single 40 mm SBN-I. I would trade off 5 H.P. for better fuel economy & the simplicity of a single carb. I read Group K found no real disadvantage to single vs. Dual carbs on the 717. Would a single carb require boring to a true 40mm? Would a single carb pump enough fuel at high RPM?

 

[racerxxx]

You can't switch to a single on a 787, to the best of my knowledge you can't put a 717 intake on a 787. A better ski would have been a GTI with the 717. But honestly, I don't find the 787 that much of a gas pig either.

 

[AdamXP800]

I see no real reason to even attempt this task. The 787 is a finely tuned machine from the factory and works perfectly with stock settings. If you want a longer range do the larger tank swap



96 XP800!
Keep the 2 strokes alive!

 

[truck240]

I own a 97 GTI with a 717 and like the simplicity. My bad cause I thought the rotary valve covers would be interchangeable. I was thinking of buying a 97 GTX and dual carbs are double the trouble and expense. I am cheap and only want to buy one rebuild kit . I've read many times how people were unaware of one carb running lean and taking out an engine. I also like the simplicity of the RFI's but the ECM are worth more than the engines.

 

[racerxxx]

If you're concerned about one extra rebuild kit............sir you are in the wrong hobby. Dual carbs are a piece of cake.

 

[Shaw520]

That discussion can go either way, I've seen too many multi cyl/ multi carb engines bite the dust because one carb leaned out and the other carb/s carried the engine to it death. A very common submission to many inline two stroke outboards with 3 carbs feeding 6 cylinders... in that configuration it can be difficult for the operator to recognize...

....and then there's the added expertise in synchronizing those multi carb intakes,.... not to say that it's a bit deal on a 787,.. but try syncronizing 6 carbs.

 

[96spxpos]

Yea definitely a costly hobby, especially the fact that it costs money to go out and enjoy our hobby.. Lol I read a guy on the forum who hasn't taken his ski out ONCE this/last season because of the price of fuel... BUY AN ELECTRIC MOPED!!!!!!!
[MENTION=74320]truck240[/MENTION] , as they said...May not be able to be done from a 787 to 717, but I have seen it done on a 717 dual carb to a single carb. Our forums resident OCD neat freak, [MENTION=33508]ocod[/MENTION] has performed this feat

 

[truck240]

Was just curious if it was possible. My 97 GTI performs great for what it is & I will likely never sell it. It seems to sip gas when I use it to wakeboard. I honestly thought about buying a new Spark to replace the GTI but I can't justify spending that much money on what may be a downgrade in ridability.