
Originally Posted by
old man roger
stock exhaust will give you the best low end and syncing the throttle bodies can never be a bad thing but i have seen a few people with 636's with no low end and no one has really come up with a good reason why , i know thats not a great answer but

had the same problem on my 636 i had a few years back,if you remember i posted a thread..in my case it ended up being a tired motor that burned a little bit of oil then alot then blew up at the lot overheated on a limiter burnout

fresh motor solved the bog