Jump to content

Sherco engine noise?..


smiff
 Share

Recommended Posts

Brand new to motorbikes and trials bike, bought myself a 2004 sherco 290 the other day to mess around on and have a bit of fun.

The bike rides absolutely fine however there is a strange tapping nose coming from the engine that doesn't sound quite right, anyone have any idea what it could be ? 

heres a link to a video of the noise...

cheers. 

Link to comment
Share on other sites

 

 
 
 
 
 
 
 
 

Hi, I had an 07' 125/200 that sounded like that, I did all of the above suggestions and still lived with that noise for two years. Someone at a trial commented that it sounded like a sewing machine, so I sold it still running terrific.

cheers Taff

Link to comment
Share on other sites

 
 

Look in the posted links above for the manual on doing the main bearings, hardest part is getting the engine out. Make sure you replace the crank seals with viton versions

Describing how to check the big end for wear is a bit hard but basically hold the crank steady & push & pull on the rod to feel whether there is play up & down rather than side to side. Piston wear really needs proper measuring equipment but if it has gouges or large amount of discoloration below the rings replacement is definitely needed. Piston kits aren't cheap, find out what Beta charges for a 270 piston kit as they are the exact same part made by vertex & may be cheaper

How far from splatshop are you? Chris etc are a wealth of knowledge & should be able to supply everything you need, I've done my bearings before with parts from them & I live on the other side of the world 

Link to comment
Share on other sites

 

Thanks for all the replies lads its all helpful to me, hopefully i will have time to dive into this project over the weekend.

 so to change the piston do i need to take the engine out or can i just take the head/barrel off? 

 

 

Link to comment
Share on other sites

 
On 12/11/2017 at 1:07 AM, tony27 said:

Look in the posted links above for the manual on doing the main bearings, hardest part is getting the engine out. Make sure you replace the crank seals with viton versions

Describing how to check the big end for wear is a bit hard but basically hold the crank steady & push & pull on the rod to feel whether there is play up & down rather than side to side. Piston wear really needs proper measuring equipment but if it has gouges or large amount of discoloration below the rings replacement is definitely needed. Piston kits aren't cheap, find out what Beta charges for a 270 piston kit as they are the exact same part made by vertex & may be cheaper

How far from splatshop are you? Chris etc are a wealth of knowledge & should be able to supply everything you need, I've done my bearings before with parts from them & I live on the other side of the world 

I live quite far from splatshop but i have already been in contact with Chris and he is super helpful! he seems to know whats going on so i will find out what damage has been done when i take it apart. 

 

Link to comment
Share on other sites

 

If you're unsure of the condition of the big end etc it's best to give it to someone who knows what they're looking for, ideally a trials dealer if possible. A engine reconditioner will be able to accurately measure the bore for you

I find splatshop's site great for ordering parts with how suggestions of other parts needed come up at the bottom. I would suggest replace the waterpump seals & bearings while the engine is apart, check the shaft for grooves as well

Do not remove the head from the cylinder if you haven't already, it's not necessary for doing the piston & will save you needing to buy new o-rings which are 1 use only

Edited by tony27
Link to comment
Share on other sites

 

Join the conversation

You can post now and register later. If you have an account, sign in now to post with your account.

Guest
Reply to this topic...

×   Pasted as rich text.   Paste as plain text instead

  Only 75 emoji are allowed.

×   Your link has been automatically embedded.   Display as a link instead

×   Your previous content has been restored.   Clear editor

×   You cannot paste images directly. Upload or insert images from URL.

Loading...
 Share

×
  • Create New...