Thread: 04 GP1300R Throttle Hesitation
08-27-2014, 08:52 PM #1
04 GP1300R Throttle Hesitation
I've done a lot of searching on this forum but can't find a true answer. I have a 04 Gp1300R with a throttle hesitation when ever the engine is below its powerband. Once I hit the throttle wide open from idle position the engine hesitates for a second before it takes off. The engine runs great otherwise.
Things done are:
New spark plugs gapped to 1.0mm
clean fuel strainer
D plate with chip
110 psi compression on all 3 cylinders
Premix 40:1 Amsoil
I've read a few threads saying this is normal for the 1300r's but I find that very hard to believe since this ski was one of the best back in the day. I've also read the not having chip will do this but I checked the chip and its good at 1kohms.
08-27-2014, 09:33 PM #2
I had the same problem but to a bigger extent to where after time it hesitated so much it stopped getting past 10 mph, if your up for it pull the carbs and check the reed valves then look over the carbs.
08-28-2014, 10:11 AM #3
- Join Date
- Aug 2010
No carbs on a 2004 its a FI
08-28-2014, 11:40 AM #4
08-28-2014, 11:43 PM #5
- Join Date
- Aug 2010
this is a 2 stroke . i have never had one that popped right out of the hole, but the accelaration after you get on the pipe should be great. You have one with the powervalves. Those of us with the non PV models have even a bigger throttle choke.
08-30-2014, 01:47 PM #6
I think I'm going to try a fuel controller and richen the # 2 pot which is the one that acts as an accelerator pump in a carb.
08-30-2014, 03:14 PM #7
Have you checked the power valves movement?
Why pre-mix? it will lean the air fuel.
-that's a lot of oil at idle+ to gum up the plugs and PVs.
The 1300s are naturally tough to get rolling which is why the jetworks mod is a must.
08-30-2014, 04:09 PM #8
- Join Date
- Aug 2014
I have a 2003 GP1300R modded. You shouldn't be gaping the spark plugs, the NGK BR8ES-11's come pre-gaped. Why would you go premix? I assume you will be fouling plugs a lot more now and run into lean problems like my buddy did when he converted to premix. Every GPR, new or old have a slight hesitation when you open throttle from idle, but that shouldn't be a concern because these skis are rockets, at least mine is. They are not tough, but if you are stock, i'd suggest a Solas impeller, pump stuffer, performance jet nozzle and Riva free flow exhaust for bottom end, what a difference it makes. A one second hesitation does not seem abnormal for these skis. If it aint broke, dont fix it. Nothing is wrong with your ski. Do you have a fuel injected vehicle? If so, same thing, you hit the gas and a very slight hesitation before acceleration, its common.
08-31-2014, 11:44 AM #9
I suppose being premix could lean the fuel mixture thus leaning the engine on idle, hence the hesitation. I was told buy a builder that the d plate will cause a hesitation because the exhaust is more free flowing which will lean out the engine on wide open throttle. I find that hard to believe because that's why the d plate is that shape and size....
Power valves all move properly. I checked them.
09-09-2014, 06:44 PM #10
I have found the hesitation problem!! When I bought the ski it was premix. I reinstalled the stock oil injection pump and the ski runs great now!!!! The premix was making the fuel ratio lean causing the hesitation.
Thank You everyone for the input.
Users Browsing this Thread
There are currently 1 users browsing this thread. (0 members and 1 guests)
By Cashito in forum Yamaha PWC Performance (2-stroke)Replies: 13Last Post: 02-05-2015, 08:56 AM
By treemoney in forum Yamaha ClassifiedsReplies: 9Last Post: 09-16-2009, 06:40 AM
By Bryan K in forum Yamaha ClassifiedsReplies: 3Last Post: 11-20-2008, 06:37 PM
By ehiebert in forum Kawasaki PWC Performance (2-stroke)Replies: 1Last Post: 11-14-2007, 06:35 PM
By sse107 in forum 4-Tec PerformanceReplies: 8Last Post: 09-14-2005, 06:54 PM