Loss of power ;(

Hi I have a yamaha jog r with a 70 kit sports pipe and new variator it was set up in a shop and wen I got it back it was flying but now it seems to have lost soo much power so I have replaced the rollers and it is still the same if anyone can help me please I will be thankfull

 

Did you change the clutch springs atall? Im not entirely sure it will help, but firmer clutch springs normaly go well with a sports pipe.

 

Yup changed the springs but it's still on standard clutch just don't know what it could be :/

 

Carb setup? In most causes that is the problem with the carb. I had that before on my 50 kit. Do you have open air filter? If yes then take the carb out and if its dirty give a good clean and set up as it was before. Should be fine.

 

Cheers mate I an running it on the air box at mi but I was thinking weather to put a filter on do you think it's better with a open air filter or air box?

 

Keep the airbox and dont get a open filter unless you get a 21mm carb. Remember you should be taking it easy and breaking new engine in. Did the garage upjet and replace the reeds as they usually come with the malossi kits?

 

Ye mate they had it running mint and then all of a sudden it's just started screaming at like 40mph wen it use to do 62 wil more left in it little help please

 

What gram rollers have you got in the variator now and what did you have before? If its screaming at 40mph they sound too light and you will overev the engine and thats not what you want

 

I have 17.5 mm carb with open air filter (actually without filter anymore because dickheads up in uxbridge steal my filter while my ped was parked) and i have 72 main jet on it. So you dont need to run minimum 21 mm carb. any carb will do unless you have proper set up on it.

 

you can have a filter with any carb but it isnt in my opinion it isn't needed until you get a 21mm or above. There is no need otherwise. I remember ppl trying to nick airfilters back in the day in Croydon all the time. I don't know why theyre only 10-20 quid. Cheapskates! All i meant was keep the standard airbox until you NEED a filter

 

Cheers for info. People and there same weight as what was in befor and I am gettin a 21mm carb wen ped stop get some in lol it only started other day on some web sites it says it could be running lean and gettin too hot :/

 

My nice Polini air filter . Im gonna put the air box back on

Brucky, How about checking the reeds maybe they needs replacement?

 

I had them done when it went in the shop mate

 

What happened was the reeds went so I took it into a shop to get it fixed and then they set it up then it was running mint but that was like a Month and half ago and now it has just losses power on topend I have replaced rollers with Ye same weight as what was in befor and it is still doin same it feels said te clutch could be slipping :/ thanks for all infor everyone

 

Get a new drivebelt mate

 

Already had one mate a Kevlar one that I have ran in for 100 mile think it could be the clutch slipping or summat thinking about gettin a gear up kit

 

sort out this before buying a gear up

if the clutch was slipping itd be before 10mph, its not that. your clutch is free and fine after about 10mph. forget the clutch entirely

 

and the more reason and proof they have to shift the blame onto you, the less liable they are, which in turn means the more money they can steal off you to fix it.