Passed rev 7000rpm problem

[Rex]

Hi all,

I am a new beat owner, i found a problem from my beat, it cannot passed rev 7000rpm on each gear, i read many related posts on forum from 2002 to 2011, however, i still no luck to find out the solution on whole day:(

If anyone met this problem also and fixed, please share with me. Many thanks and sorry for my English.;):D

Problem video:
https://youtu.be/hgmMmr8u2Wk

[Steve_M]

There are several cars with this same issue, but I don't think I have seen anyone actually fix it, I tried many thing on Adrian P cars, but never got to the bottom of the problem.

[Rex]

Hi Steve

I asked many JAPAN beat group, some guy said that the In & Ex valve spring installation are incorrect when rebuild engine, Maybe they swapped the springs to install, i think they are correct, because my beat last owner ever rebuild the engine, i will check this part.

In spring: 14761-p36-003
Ex spring:14762-p36-002

[Rex]

Steve,

I just found it

https://isomasa.com/news/post_3295/

https://isomasa.com/news/blog/post_191/