GRiSO 850 remap

Y'know I reckon if you took the blanking plugs out of the inner spark plug holes of the 850 and added a plug and swapped the coils for twin discharge types you could make the 850 a lot more 'Bellagio Like' with a bit of help from Mark.

Just think in' out loud.......

Pete

Pete Roper wrote:

Y'know I reckon if you took the blanking plugs out of the inner spark plug holes of the 850 and added a plug and swapped the coils for twin discharge types you could make the 850 a lot more 'Bellagio Like' with a bit of help from Mark.

Just think in' out loud.......

Pete

I hope you're right, I'm waiting for my new coils now
Steve

Ok Pete, how much of a difference do you think twin sparks would make to an 850 ? How much do you reckon it would cost ? What would you expect the main noticeable differences to be ?

Cost would be minimal, the heads are already machined for the extra plugs, they just have blanking plugs in place of spark plugs. Then as I said, simply swap the coils for twin discharge types and re-map accordingly.

My guess is that this would give the baby GRiSO considerably more bottom end grunt. One of the things that surprised me when I first rode a Bellagio was how strong they are at the bottom.

Pete

Hi Guys the only thing that is difficult to nail down 100% is the fuel consumption numbers.
That said I am 120kgs and I do give her a bit of a nudge.
In terms of improvements it is very very noticeable. The popping shifting up and down has gone, throttle is not twitchy, roll on pick up is much better and the idle is 150 rpm's lower and steady. The bike does start easily when cold.
Overall it is a much improved beast.
In a previous question above the answer is she has 29,450 kms on the dial and last serviced at 21,000
I do change the oil and filter between service intervals btw.
I must say being an ECU ignoramous I am blown away with the remapping outcome. Thank you for a top job well done.

If the idle is lower I'd think that pulling out a little fuel with the CO trim might be worthwhile.

Pete

Need more data. Need pics of plugs and ride report at CO = -10, Please!

Hi all!

Did not ride for while due vacation trip. Before trip I did reset auto learning parameters and set CO trim to -5. Sometimes it seems to have bit struggle on start and I have to give it bit gas even when its not very cold outside (+18C). Engine idles somewhere 1.2k and seems to hunt slighty. Ill test today to set CO to -10.

Should I remove lambda probe if its not being used? Guy from finnish forums recommended it but I dont see why?

Google translation:

Quote :

if and when you are putting GuzziDiag lambda Off-setting is worth thinking about what will happen relatively valuable probe there in the exhaust pipe. The sensor is connected to the M18 thread and a hole can be plugged available from auto supply store with a stopper. The exhaust pipe remains in the catalyst. If a conventional richer mixtures are used as is in danger that the catalyst is blocked. Similarly, if the mixture is too lean, the catalyst may melt.

source
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Hi Joni,

I would think if it is hunting at idle, then going to CO= -10 it will exacerbate the issue. I would actually try it -2 or -3.

Leaving the O2 sensor will not hurt it. The heater in the sensor remains active, so it will not clog.

Hi Beetle,
I have an GRiSO 850 with this GPR exhaust and an air filter from K&N, otherwise it's a standard bike.
The fuel consumption is very high, around 0,7 liter per 10 km. I also have some popping when releasing the gas too quick. Is it possible for you to create a better map for me?

/Peter

Sure. I'll have a crack. Leave it with me.

Get rid of the bloody K&N!

Pete

I loaded the map from beetle today and took a test ride for about 80 km, both some city and highway riding and the fuel consumption has now decreased to 0,62 l/10 km. It was decreasing all the time when I was on the highway, so I will take it for a longer ride soon. I have only been able to go just below 0,7 when I was trying to ride very lean before.
The popping when releasing the gas quick disappeared as well

Yesterday I did a trip for 280 km and the avg. fuel consumption for that trip was 0,61 liter / 10 km.
I took som pics of the SP, they can be seen on those links, seems to be a bit rich, I think.
Spark plugs
Spark plugs
Spark plugs
It's not so easy to get the colours correct, but I think that I got it as close as possible.

Today I have done some work to the bike, checking the valve clearance and adjusting them, inlet was 0,20 and outlet 0,25 on both sides, so that's corrected now. I also did a throttle synchronization. After resetting TPS and auto learning I took it out for a short trip at 80 km on the highway, speed between 100 - 120 km/h. The avg fuel consumption was now 0,57 - 0,58, going up and down between those values. Haven't checked the SP's yet, a bit too hot for that.

Update
I have been running the bike for about 600 km since the last posting, and the popping at deceleration has returned, also the fuel consumption went up a little bit to an average of 0,6 l/10 km.
Here are some pics of the SP's, it seems to me that the RH SP is a bit more lean than the LS SP, what could be the reason for that?

Left hand Spark Plug
Right hand Spark Plug