xr200r problem

[suzuki447]

hey guys got little problem with mates bike seems to be oil,n plugs we set carb back to standard settings in manual ,good fuel, very hard to start after while ,if u put new plug in it starts first kick and run great but after awhile,its hard starting again ,any ideas bike is in great condion  ,motor strong with no problems beside this,any help would b good thanks don

[cyclegod]

Is it a mid-80's RFVC four valve model?
If it is you probably have a cracked head between the plug and one of the valves (a common problem with mid-80's models)

[suzuki447]

no its 81 2valve thanks don

[smed]

the slide needle & needle jet could be worn,common problem with four stroke hondas with kiehin carb,makes them run rich & foul plugs,if thats the problem it cant be tuned out the only fix is a new needle & jet,I figure you are no dummy seeing the number of bikes you have so I,m assuming you have checked valve clearances & air filter cheers Smed

[TT5 Matt]

as smed says and check the float tang where the needle makes contact they wear badly there as well causing incorrect float level

[matcho mick]

plug cap?,big resistance when up to running temp??

[Mike52]

Valve guide seals?

[suzuki447]

thanks guys ,bike is a mates so i help him chek everything u  suggested ,i have 84 4valve 200 which i have just rebuilt with help of a thumper expert ,i,m a 2stroke boy so i know bugger all about thumpers,thanks again.