KX Riders

Maintenance & Technical => KX500 Original => Topic started by: chrisxj on October 16, 2011, 10:12:38 PM

Title: engine mounting
Post by: chrisxj on October 16, 2011, 10:12:38 PM
hello gentlemen i need to know if the engine mounting holes are the same on the cases through out the different years i.e. will a 91 engine mount to an 86 frame
Title: Re: engine mounting
Post by: jonny500 on October 17, 2011, 05:50:10 AM
no is the answer, you may get it to bolt in but the exhaust will not go on due the frame difference. 85 or 86 motor are your only
choices  an possibly 84
Title: Re: engine mounting
Post by: dave916 on October 17, 2011, 06:13:17 AM
no is the answer, you may get it to bolt in but the exhaust will go on due the frame difference. 85 or 86 motor are your only
choices  an possibly 84

Jonny i think 89/on motor should fit in the 86 chassis ,
the only thing you might need is the 86 inlet manifold 
Title: Re: engine mounting
Post by: jonny500 on October 17, 2011, 06:31:26 AM
no it wont (in the nicest possible way) :-D. the 86 and earlier had a single cradle frame where the exhaust went round the out side of the single down tube. the 87 on had a semi twin cradle where the exhaust went in between the 2 cradles. the engine may bolt in but the left side cradle tube will be directly over the exhaust port. below is the 86 and the 87 look at where the pipe comes out of the cylinder on each. also the exhaust fits directly in to the cylinder with no manifold. it could be done but major frame mods would be needed
Title: Re: engine mounting
Post by: dave916 on October 17, 2011, 07:18:12 AM
thats a 86 kx125  not a 500
Title: Re: engine mounting
Post by: jonny500 on October 17, 2011, 07:38:08 AM
 :-o iv got 125s on brain. been working on a couple today. ignore all i have said its BS. should have read the post properly, what a burk i am lol. sorry dave i think im losing it or already lost it. time for a break :roll:
yes 89 500 into 86 should be fairly easy
Title: Re: engine mounting
Post by: chrisxj on October 17, 2011, 09:32:43 AM
  well some of thats my fault i should of put 500 in their somwere but i didnt but thanks to the both of you
Title: Re: engine mounting
Post by: dave916 on October 17, 2011, 09:03:33 PM
  well some of thats my fault i should of put 500 in their somwere but i didnt but thanks to the both of you
The clue for me was the forum section it was posted in         kx500 Original   :-D :-D :-D

Title: Re: engine mounting
Post by: jonny500 on October 18, 2011, 04:26:17 AM
i know :-P