Poor gas mileage 2013 christini 300 with gasgas ec300

[Jakobi]

How often is the magneto side crank seal faulty ? Is this a design flaw ?

I replaced the clutch side crank seal even though it was in perfect shape.

I've had to replace one in a combined 420+hours of engine use.

I've had to replace 2 x counter shaft seals due to some very wet seasons and lots of mud.

I've gone through a few linkage bearings due to lack of maintenance, and a couple of wheel bearing sets too; again due to riding wet and muddy conditions constantly.

Where is this going??

Magic with getting these bikes to run right is simple.. get the head clearance reduced. Have the compression ratio adjusted back. Clean up any casting floors in the cylinder while you are at it. Set the float, jet and forget.

 

[lneil06]

Update - idling - but smoky - No hanging idle

Current Needle - JD blue - 2nd clip
Main - 178
Pilot jet - 40
Idle jet is 2.5 turns out

OK - I must of whacked the float taking it in and out so many times - It was hanging down about 13mm - I reset it to 8.5mm

Installed new choke - non-remote - bad thing have a real hard time reaching it when the front drive chain is in place - I do have a new remote choke as well - but wanted to eliminate one variable.

Jakobi - This bike doesn't have many hours on it - at the very most 60.

It's real smoky on idle - but 1/4 throttle lifts the front end - without me hanging off the back of the seat. Seeing a decent amount of oil out the muffler.

Lenny

 

[barbotte]

anyone has oversized tank on thier christini or auxiliary tank ? i cannot even ride with friend anymore as i burn too much fuel
i cannot wait for the jd kit to show up and hope it will solve my problem
cheer

 

[lneil06]

anyone has oversized tank on thier christini or auxiliary tank ? i cannot even ride with friend anymore as i burn too much fuel
i cannot wait for the jd kit to show up and hope it will solve my problem
cheer

I do have the over sized tank on my Christini - it does help. Did you check your float height ?

 

[barbotte]

where did you get that tank ?? do you have picture or part number?
and yes i check the fload and it seem to be right on spot
i should had get the 450 instead ... waste of money it was ,,
cheer

 

[lneil06]

Update

OK - Interesting -

Jetting - 178 Main
Pilot - 38 - 1 turn out

Float height 7mm - reduced from 8.5mm.

When the bike is upright - and put it in gear, if I tilt onto the kickstand the motor will idle down real low. If I hold it upright - with it in gear - it will just sit and idle no issues. That is why I went to the 7mm float height to see if this changed - NOPE - No change.

Any ideas ?

 

[lneil06]

where did you get that tank ?? do you have picture or part number?
and yes i check the fload and it seem to be right on spot
i should had get the 450 instead ... waste of money it was ,,
cheer

I bought the 300 - because the power was supposed to be closer to my 2008 -Yamaha wr450. I have to say I love the power of my wr450 - completely linear with exceptional torque. I haven't had to down shift on this bike going up steep hills either - it just tractors. The traction is really good - but have to admit its probably the rear tire - MITAS 946 - ice and snow tire -
AWESOME tire - but expensive.

If I could of put my Yamaha wr450 motor in the Christini - I would have done it.

How are your brakes ? The Christini brakes on my bike are a bit tougher than my wr450.

Lenny

 

[barbotte]

brake seem to be ok as i am not a experience rider ( 4 year now) i was on a honda 250x before and now the cristini ... with the poor millage i am getting with it i almost wish i have done the conversion kit on it instead or buy the 450ds.. but yesterday was fun i got stuck on a depth mud hole as i forgot to turn the awd on .. switch it on and like magic i came out. it was so cool to see both tire spinning to get me out .. by the way i did 10 klm more before reserve ( i play with the float bolw ) not much but better ( from 15mpg to 17 mpg lol) ..i cannot wait to get my jd stuff ...my goal it to get 22mpg or 65 klm before reserve ...but it is a small tank 2.2 gallon only ..
cheer

 

[barbotte]

after 55 klm this is my my plug look like is that good ?? or bad ?
thanks
[/ATTACH]

 

[lneil06]

after 55 klm this is my my plug look like is that good ?? or bad ?
thanks
[/ATTACH]View attachment 7064

That looks a bit rich to me !

At the bottom of this link shows some good pictures of spark plug results
https://mechanics.stackexchange.com...of-lean-or-rich-carb-settings-on-a-motorcycle

 

[barbotte]

thank for the info if i dont get my jd kit by the week end i will raise the needle by 1 clip and try ,, i hope it will help with the poor gaz millage ..as i ride mostly wood so 1 and second gear and sometime 3th
cheer

 

[pscook]

thank for the info if i dont get my jd kit by the week end i will raise the needle by 1 clip and try ,, i hope it will help with the poor gaz millage ..as i ride mostly wood so 1 and second gear and sometime 3th
cheer

Raise the clip one notch to lower the needle and allow less fuel.

 

[Jakobi]

Here's my pluglet.. for comparison. This has quite a few hours on it..

But really looking at a plug doesn't really tell you too much unless if you run it with a certain intent and know what you're looking at.

 

[nhgas]

Lenny, is this your bike?

https://worcester.craigslist.org/mcy/6204973366.html

 

[lneil06]

Yes - That is my bike - it also has a Active Minds Engineering Route sheet holder on it as well. My son's bike is an older 2003 KTM EXC - and he has been bugging me about a newer bike with an electric start. My Yamaha wr450 and Christini are a bit heavy for him - so really need to shed the herd a bit and get him something more manageable.

I'm doing it with a lot of hesitation - because the Christini has been critical at the New England Classic kids ride when I'm helping with the kids get up the steep hills or out of mud holes. It's also a blast going through mud holes and riding in the snow.

Lenny

 

[lneil06]

Here's my pluglet.. for comparison. This has quite a few hours on it..

But really looking at a plug doesn't really tell you too much unless if you run it with a certain intent and know what you're looking at.

That looks AWESOME !!

 

[barbotte]

I want that fuel tank and the rear rack ...let me know if you decide to part it out ...lol cheer

 

[lneil06]

I pulled it off Craigslist - really don't want to give up on this bike - it's just awesome in the mud, steep hill climbs, and snow.

Tonight - I changed the float height once again - from 7 to 9mm - still smokey at idle - but it's idling now.

I put in the J&D Blue needle - clip 2 - Talk about a night and day difference between the red Clip4 and Blue #2. 1/4 throttle and the wheel comes right off the ground. I'm glad i have the throttle tamer on it. I have a 175 Main in it.

Now I need to fill the tank and see what I get for Gas Mileage this weekend.

I really don't want to lean it out anymore - because the power will become unsafe for me or my son in the woods.

Thank you everyone - it's been a huge struggle...

Lenny

 

[barbotte]

ok no jd kit yet so i decide to pull carb out ,,, needle is n1ef clip 3 ( dead center) jet is 170 and the other is 42 ..going to raise it 1 clip and play with the float bowl ( raise it to 9 mm )
..by the way is that needle good or should i get another one ?? if so witch one should it be ?
thanks

 

[swazi_matt]

From the little I know I think best results are from an n3_ _ or an ne_ _ needle range
I had the ktm n3eh and it was a bit more spunky than the nedw that I have now